When Tsuyoshi rushed to school as usual, he found a girl who tried to help a kitten which couldn’t get down from a tree. It was Minamizato Ai who had loved Tsuyoshi secretly for a long time.

High school students Mizuho Yuuki and Miko Kamiyama are best friends. Miko likes fellow classmate Tohru Nagase. Mizuho is determined not to get in the way of their budding relationship. But ...