Title: Koi iro Chu! Lips
Original title: こいいろ Chu!Lips
Length: Medium (10 - 30 hours)
Year: Japan 2006-06-30, English Patch 2014-06-21
Developer: PeasSoft
Publishers: PeasSoft
Language: English
Voice: Japanese
Translation: Denwatls

Description:
Haruka is just your average high school student idly coasting through his life. His mornings generally start with a delivery from his childhood friend and neighbor Mirai, who has an inexplicable hate for him. His daily commute is interrupted by the cheerful and forever-in-love Nagisa, who never misses an opportunity to profess her undying love for him. At school he spends time with his good friend Ikuya, a bit of a pervy moron, often finding himself in trouble with his mature yet cute teacher Shizuku.

His lazy days continue on and on, until a chance encounter with a mysterious pot changes his life forever… How will his life ever return to normal?!

Important:

1. You need to change locale to Japanese.
   http://erogedownload.com/faq/changing-to-japanese-locale-on-windows-7/

2. No need to install.

Screenshots: