Suki na ko to Ryouomoi ni Nattara Torimaki no Joshitachi to 4P Shichatta Hanashi

A boy who has just started dating the girl he likes, Aika, is caught in a compromising position by her two friends, Saya and Yui. They reveal they have been 'training' him to be a good partner for Aika. Aika discovers them, but instead of being angry, she joins in, leading to a four-way sexual encounter. Shinichi, Aika, Saya, and Yui engage in sexual activities together. Saya and Yui help Shinichi prepare for Aika, and then Shinichi and Aika have sex while the other two watch and encourage them. Shinichi continues his sexual encounter with Aika, Saya, and Yui. They take turns having sex with him, trying different positions and even putting on swimsuits for him. The story concludes with Shinichi officially dating Aika, while continuing a four-way relationship with her friends Saya and Yui. The girls are shown in various outfits, including bunny suits and aprons, engaging in sexual activities with Shinichi.