恋愛方程式 [Renai Houteishiki]

泣き虫のガキだとばかり思ってた1コ年下の幼馴染・奏に、突然ファーストキスを奪われちまった巡！　最近背も伸びて女子に「ピアノの王子様」なんて騒がれてるけど騙されないぞ。あいつは男の唇を奪う変態なんだ！　完璧バージョンで登場!!

The one-year-younger cry-baby and childhood friend, Kanade, suddenly took Meguru’s first kiss! Though he's grown taller a bit recently, and the girls made a big fuss and called him “the piano prince”, I will not be tricked. He’s a pervert who steals another guy’s lips! With additional pages, the perfect version is now on sale. ♥

The first chapter was originally released as chapter 4 in volume 2 of Not Ready!? Sensei.