S-CUTE premire presents a slender, small-breasted amateur girl named Tsuna, who harbors deep feelings of love within her innocent heart. To him, she appears like a delicate flower blooming with shyness and excitement. Her emotions reach him, and their joyful days together begin. Though shy, Tsuna experiences the happiness of being held by the one she loves. He promises her, "Let's stay together forever," sealing his vow to the pure-hearted teenage girl. But suddenly, their innocence is shattered when her boyfriend decides to move to Tokyo. A crossroads in life threatens their relationship. Emotionally overwhelmed, she cries out, "I'll quit school and follow you!" Tears stream down her face. A bittersweet love story unfolds amid life's uncertain path. After much hesitation, he chooses to accept her feelings. The two desperately cling to each other, confirming their love. The innocent girl and pure-hearted boy unite passionately, driven by raw emotion. Eventually, they make a solemn promise to each other.