Careless na Aitsu

1-5. Unforgettable Days
About a couple who drifted apart after the girlfriend who is his senpai graduated and started going to a university. Few years later when he entered a university he met her again but to find out she is now a slut.
6. Freestyle
About athletic sister who is bored and has sex with her little brother.
7. Parting Gift of Summer
Two childhood friends who live next door get intimate over summer.
8. Careless Kid
Guy who mistakes a porn star for his senpai.