2204 Toutetu

During the affair, the look of surprise on her face when she realized that he was watching her, the strings of saliva from kissing and licking her fingers, the movement of her fingers rubbing her crotch, the smoothness of the movement of opening her zipper, the movement of onanism and ejaculation is amazing. 　（Maybe the English is strange...）　

I have a hunch that seated-guy was Sakamata's crush or maybe even boyfriend and Sui-sama arranged this to 1, Force them apart & 2, Take the now ex-BF for herself. SKMT is def yandere eyes at the end but even in the beginning she looks shocked when she realizes seated-guy is watching her get railed. Maybe not though.... either way, good stuff.