Onee Danshi, Hajimemasu.

Synopsis

Regular high school boy Tooru Takahashi is in love with high school girl Yuri Otogane, but she's not really into guys. Tooru decides to win Yuri's heart by embracing his feminine side so he enlists the help of one of his "girly" friends, Toranosuke Sagara, to help develop his sense of beauty... (Source: MU)