Little Bird, Want To Fall In Love?(2016)

Hiyo-chan Koi wo Suru?

In love with their respective brothers, high school students Yoh and Tatsuki pretend to date. Their plan is to make each other's brother jealous... until one day, the act starts to become real. Now that Tatsuki is starting to think Yoh's purity is cute, he absentmindedly kisses him! He's all in and offers to teach Yoh the ins and outs of steamy kisses. The little bird is more than willing to accept.

(Source: Renta!)