High school student Yui Tachibana loses a game she played with her friends. Now she is to receive a penalty. However, in order to carry out this punishment, the girls need a certain “thing”: their classmate Shougo Kageura, a weird otaku boy. Yui is supposed to take Shougo‘s virginity as punishment. What’s more, in front of all her friends! They climax rather quickly, though Yui can’t get Shougo out of her mind – especially his beautiful, perfect-sized cock. Soon, this “one-time punishment” turns into more…