Shy Takashi befriends Yukio, a kind, friendly top student. Unbeknownst to Takashi, Yukio is actually interested in Takashi's mother, Iku. Using his position as Takashi's best friend, Yukio gradually draws closer to Iku, capturing her heart. However, Yukio's true intention is to possess Iku for himself. As his scheme unravels, Iku is forced to make a difficult choice. The story unfolds into a tangled web of friendship, betrayal, and emotional conflict.