Baka Dakedo Chinchin Shaburu no Dake wa Jouzu na Chii-chan - Ep.2

The main character is a chubby kid named Kou who lives alone because his family has some problems. Walking down the street, he met his classmate. After a short communication between them, a romantic relationship began, which, rather quickly, turned to the horizontal plane. The boy can be understood, because this girl is very beautiful and slutty, and also has an impressive chest. How will this couple end their summer vacation?