The Reason He Fell in Love with Me.

University student Nagisa becomes the tutor of high school student Kokusai. Despite their contrasting personalities—Nagisa being serious and responsible while Kokusai is carefree and charming—they develop a close bond. As they spend more time together, Nagisa finds himself drawn to Kokusai in ways he hadn't expected. Their relationship faces challenges as they navigate personal feelings, societal expectations, and their own uncertainties about love.