こいけん!

Yuuji encounters Kaede, a girl who is returning from living abroad and transferring into the school. Kaede is cute but a violent girl. She creates a love researcher group 'Koi-ken!' and forces Yuuji to become a member because the club has no enough amount of members. Yuuji's life turns colorful with the presence of senior Sakura and Nagisa, an idol.