diff --git a/packages/font-chillroundm/LICENSE b/packages/font-chillroundm/LICENSE
new file mode 100644
index 000000000..dba0d1a61
--- /dev/null
+++ b/packages/font-chillroundm/LICENSE
@@ -0,0 +1,93 @@
+© 2023 ChillType, with Reserved Font Name 'ChillRoundF' 'ChillRoundM'.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/packages/font-chillroundm/package.json b/packages/font-chillroundm/package.json
new file mode 100644
index 000000000..2a68bb55b
--- /dev/null
+++ b/packages/font-chillroundm/package.json
@@ -0,0 +1,31 @@
+{
+  "name": "@proj-airi/font-chillroundm",
+  "type": "module",
+  "version": "0.9.0-beta.4",
+  "description": "Essential CSS for font, ChillRoundM (a.k.a. 寒蝉半圆体), used by Project AIRI",
+  "author": {
+    "name": "Warren2060",
+    "email": "87366329+Warren2060@users.noreply.github.com",
+    "url": "https://github.com/Warren2060"
+  },
+  "license": "SIL Open Font License",
+  "homepage": "https://github.com/Warren2060/ChillRound",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/moeru-ai/airi.git",
+    "directory": "packages/font-chillroundm"
+  },
+  "exports": {
+    ".": { "default": "./dist/index.css" },
+    "./index.css": { "default": "./dist/index.css" },
+    "./files/*": { "default": "./dist/files/*" },
+    "./files/*.ttf": { "default": "./dist/files/*.ttf" },
+    "./files/*.otf": { "default": "./dist/files/*.otf" },
+    "./*": { "default": "./*.css" }
+  },
+  "main": "./dist/index.css",
+  "scripts": {
+    "dev": "pnpm run build",
+    "build": "tsdown"
+  }
+}
diff --git a/packages/font-chillroundm/src/files/ChillRoundM.otf b/packages/font-chillroundm/src/files/ChillRoundM.otf
new file mode 100644
index 000000000..f045ad273
Binary files /dev/null and b/packages/font-chillroundm/src/files/ChillRoundM.otf differ
diff --git a/packages/font-chillroundm/src/files/ChillRoundM.ttf b/packages/font-chillroundm/src/files/ChillRoundM.ttf
new file mode 100644
index 000000000..3a4aed34b
Binary files /dev/null and b/packages/font-chillroundm/src/files/ChillRoundM.ttf differ
diff --git a/packages/font-chillroundm/src/index.css b/packages/font-chillroundm/src/index.css
new file mode 100644
index 000000000..23e7b2a8e
--- /dev/null
+++ b/packages/font-chillroundm/src/index.css
@@ -0,0 +1,15 @@
+/* ChillRoundM Regular */
+@font-face {
+  font-family: 'ChillRoundM';
+  font-style: normal;
+  font-display: swap;
+  src: url(./files/ChillRoundM.ttf) format('truetype');
+}
+
+/* ChillRoundM Regular (otf) */
+@font-face {
+  font-family: 'ChillRoundM';
+  font-style: normal;
+  font-display: swap;
+  src: url(./files/ChillRoundM.otf) format('opentype');
+}
diff --git a/packages/font-chillroundm/src/index.ts b/packages/font-chillroundm/src/index.ts
new file mode 100644
index 000000000..d2ad33db9
--- /dev/null
+++ b/packages/font-chillroundm/src/index.ts
@@ -0,0 +1 @@
+import './index.css'
diff --git a/packages/font-chillroundm/tsconfig.json b/packages/font-chillroundm/tsconfig.json
new file mode 100644
index 000000000..cb3a65dcf
--- /dev/null
+++ b/packages/font-chillroundm/tsconfig.json
@@ -0,0 +1,25 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "lib": [
+      "ESNext",
+      "DOM",
+      "DOM.Iterable"
+    ],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "types": [
+      "vite/client"
+    ],
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "isolatedModules": true,
+    "verbatimModuleSyntax": true,
+    "skipLibCheck": true
+  },
+  "include": [
+    "src/**/*.ts",
+    "src/**/*.d.ts",
+    "src/**/*.vue"
+  ]
+}
diff --git a/packages/font-chillroundm/tsdown.config.ts b/packages/font-chillroundm/tsdown.config.ts
new file mode 100644
index 000000000..31e69a2e1
--- /dev/null
+++ b/packages/font-chillroundm/tsdown.config.ts
@@ -0,0 +1,11 @@
+import { defineConfig } from 'tsdown'
+
+export default defineConfig({
+  entry: ['src/index.ts'],
+  external: ['./index.css'],
+  copy: [
+    { from: 'src/files', to: 'dist' },
+    { from: 'src/index.css', to: 'dist' },
+  ],
+  unbundle: true,
+})