Maika Hiizumi, a black-haired girl, was brought over after being entrusted to the protagonist by his senior. Attached to a collar, she looked lonely as the senior said, "Just let her suck your thing. But no sex, got it?" before leaving. That night, as he was about to sleep in bed, she suddenly appeared, beginning a two-day, one-night cohabitation filled with sexual activity. Through interactions between the quiet Maika and the equally taciturn protagonist, her hidden penchant for deep-throating gradually comes to light. The story portrays everyday moments with her, including her love for beer and seaweed rice balls. Currently released as an early distribution version.