START-310 The story of how I lost my virginity to the dignified and beautiful naginata swordsman I was secretly in love with. Honjo Suzu [Bonus footage included]

Tachikawa, a virgin, secretly has a crush on Suzu, a naginata swordsman at the same dojo, but Suzu has a boyfriend, Yamazoe, whose only redeeming quality is his martial arts. Suzu is upset when Yamazoe, who is cold and only wants her body, even when she talks to him about her troubles, and this affects her training. Worried, Tachikawa challenges Yamazoe to a fight, and urges him to break up with Suzu if he loses. However, Yamazoe, who is clearly stronger than Tachikawa, beats Suzu back, but...