Asked this on reddit looking for an anime, all I remember is some dude went and surprised a transfer student as she open the classroom door naked. as for why im looking for something like this...it just looks fun. ps. its not hentai
lets see, naked male mc - Horizon in the middle of nowhere mc seeing female lead naked - Rakudai Kishi no Eiyuutan Mc saw female lead naked while she was having a bath - Seirei Tsukai no Blade Dance mc ended up on day 1 in women's bath - Undefeated bahamut chronicle
When u prepare a "nude surprise"... Spoiler {} But she isn't "impressed" with what she "sees"... ( ͡° ͜ʖ ͡°)