Koi-Ken!

Yuuji meets Kaede, a girl returning from living overseas and enrolling at his school. Though attractive, Kaede has a violent side. She forms a love research group called "Koi-ken!" and compels Yuuji to join due to a lack of members. His daily routine becomes more lively with the addition of Sakura, a senior, and Nagisa, an idol.

Isinasalin pa — orihinal na teksto sa English.