NKD-260 - Joined the SM club and got broken by the sensei

Both have distinct characteristics and join the SM club to be trained, so there's no 'reluctant' vibe; the atmosphere is quite bright. White lingerie is a staple for school uniforms, so it's a bit repetitive, but their expressions when they thrust their hips are very stimulating. Since they volunteered, I wish there had been a bit more dialogue, especially in the ending. Recommended for SM beginners.