It's been one year after Makabe Masamune and Adagaki Aki got together, and they're temporarily on a long-distance relationship when Aki moved to Sapporo to attend university. Koiwai Yoshino, who continued living at Aki's house, finally got accepted into Juntama University after failing their entrance exam last year, and she reunited with Makabe, now a second year student here. However, trouble immediately started when they got dragged into a game by the new freshman Kyogoku Iroha, and she claimed Makabe, who inadvertently "won" the game, as her "lover" against his will...