Yuki is in highschool and has just joined the mandatory gym class. Despite being innocent and shy on the outside, a depraved girl lurks within... begging to be let out. She has taken an interest in her gym teacher to be her object of desire.
You were playing UNO with your beautiful tomboy friend, where the loser gets to do whatever the winner wants. When she lost, she decided to reveal her boobs to you without letting you speak what your desires are?!