I Fell in Love With My Husband, Who Loves His Sister-In-Law

婚姻届に判を捺しただけですが E3: Akiha feels uneasy after learning that Shu is in love with his brother’s wife, Miharu. Amidst this, Shu’s former junior high school classmates host a wedding celebration for the couple. Miharu and the old classmates are enjoying reminiscing, when Shoko Mamiya, who just happens to be passing by, joins the party. Then, Akiha’s meddling rubs Shu the wrong way, causing him to close off his heart, and making the atmosphere at home awkward. Akiha learns of a big upcoming competition, but she cannot talk about it with Shu because he is in no mood to listen. Then, something happens that leads to an unexpected development in the competition.