27 year-old Riko has been dating her partner Kurumi for 3 years now and neither of them plan to come out about their sexuality. However, they've finally become unable to stand the pressure from the constant questioning by their family and surroundings about when they're getting married. That's when they decided to get their "married" status by "marrying" a gay couple and entering into their family register. Now, the four of them are living together!

"Come on... Please just let me put it in!" While at a photoshoot for work, Wakamiya fell in love with Sakura, a model who's also a university student. He then decided to confess his love to Sakura fully expecting to be rejected but they started dating instead. Just when their first night was going so well for them, they ended up fighting over deciding who should take the bottom and top position! That's when Sakura suggested that they do the 69 position and the person to cum first will be the bottom! Note: This is a compilation of Riba Koi. and its sequel, Amaetagari no Hatsujo Usagi.

Haruki Ariake, the son of a yakuza boss, had no intention of succeeding his family and kept a distance from his father. When his father was killed by a rival group, Haruki is captured by Hideto Mochizuki, who claims to be a mysterious doctor. He claims to be Haruki's mentor and pushes him down. Haruki wants to resist, but his lower abdomen has a special lewd crest, and his body begins to react just by being touched...!