Sunakawa's older sister, Ai, has had a secret crush on Takeo since she was little. But Hayato Oda, her college classmate, is making some aggressive romantic advances. Can Ai sever her feelings for Takeo and accept Oda' s feelings? Meanwhile, a girl other than Yamato has realized Takeo's appeal?! A bonus story about Takeo and Sunakawa when they were in preschool is included in this volume!