Looking for Hentai Where Male Is Insecure About Large Penis

From what I remember the main character has a traumatizing first experience where his girlfriend refuses to have sex with him because of his size. His friend, hearing his story and thinking it's because he has a tiny dick, invites him out with his girlfriend and another girl that is interested in the main character thinking he can show off by being bigger. The friend and his girlfriend start having sex prompting the main character and the rest ther girl to also have sex revealing he has a massive cock. Seeing this, the friends girlfriend starts having sex with the main character as well and both end up with him. The following day on campus, the main character, with the two girls, runs into the friend who lost his girlfriend to him and says "thanks. You were right. Size doesn't matter" while a crowd of girls have heard rumors of his large dick and now also want a piece of him.