Sandwitched by my wife and her sister

Sandwitched by my wife and her sister is a Japanese adult visual novel about a man torn between his wife and her lustful sister. It all started when the protagonist and his wife Ayane were celebrating the one-year anniversary of their marriage when Maaya, Ayane's boisterous younger sister, suddenly barged in and declared that she was going to move in with them. When Ayane left to check up on her restaurant, Maaya grabbed a bottle and started drinking before making a move on the protagonist. In his drunken state, Maaya's brother-in-law ended up making a mistake and succumbing to Maaya's advances, inadvertently beginning an affair. With his wife and her sister now living under the same roof, the protagonist continues his affair in secret while also making love to his wife, knowing that the day will soon come where he may have to choose between them.

Like most visual novels, the gameplay consists of reading the story and interacting with certain characters while occasionally choosing from several options which may result in the story branching into different routes, resulting in different endings. The game features voice acting for Ayane and Maaya and contains explicit depictions of sexual encounters.