Iede Jiraikei Kouhai-tachi to Sex Suru Dake no Natsuyasumi The Motion Anime

One day, a junior student Selina runs away from home and asks the main character to let her stay the night...

Selina came ready to have sex with him in order not to go back home, and apparently she had a lot of experience in this. After several lewd days, Selina's friend Luna came to the hero's house.

He thought she was also experienced, but it turned out she was actually a virgin. She watches with great curiosity as the hero fucks Selina, and then begins to beg him to fuck her too...