This adult role-play side story unfolds during the summer when Takanari is away taking classes. Behind his back, his crush Iida and best friend Takashi are busy exploring sex, with Takashi enjoying threesomes with Niiyama and Iida. When Niiyama leaves on a family trip, Iida visits Takashi alone, already addicted to the pleasure she has only recently discovered. Her quiet exterior gives way to raw desire as their flushed bodies tangle together, sweaty and relentless. There is no romance between them—only newly awakened adult lust.