A certain school's badminton club is having summer training camp. Chinami, who has quickly improved her skills, is practicing diligently. She trusts her seniors Kanna and Momo, who are enthusiastically coaching her, but she is shocked when she witnesses the two secretly kissing during a break. Realizing they are being watched, the two engage in lesbian acts to seduce Chinami, who has never had any experience with a woman before...