桃色症候群 [Momoiro Shoukougun]

親の再婚で、クラスメイトの彪雅と兄弟になった皓。無口で柔道一筋な彪雅とはこれまであまり接点はなかったが、一つ屋根の下で暮らすようになって、彪雅が思いのほか皓をかってくれていたことを知る。そして、意外とスキンシップに弱いことも。以来、皓はわざと彪雅にじゃれついたりするようになるが…。

Hikari became brothers with his classmate Hyuuga through their parent's remarriage. Although he never had much contact with Hyuuga up till then, after they started living together, Hikari sees a side of Hyuuga beyond his imagination. Including his surprising weakness to skinship! After that, Hikari begins to make fun of Hyuuga, but...