Synopsis

Small, timid, and bullied by girls his whole life, Yukinari Sasaki has a body that's essentially given up on them entirely. any contact with a female sends him into full hive-breaking-out mode, which makes high school pretty miserable. Then he falls through a bathroom and lands on Seiren, a mysterious world floating invisibly near Earth where women outnumber men by a staggering margin. It sounds like a dream setup, except Yukinari's allergy doesn't care about location. The one exception is Miharu, a warm and cheerful girl from Seiren whose touch doesn't trigger anything, and who ends up following him back to Earth, moving into his house, and turning his already chaotic life completely sideways. The comedy comes from watching someone with a literal female allergy suddenly surrounded by more girls than he's ever had to deal with, while Miharu navigates Earth with zero idea how any of it works. It's lightweight, a little absurd, and leans hard into the romantic-comedy chaos without taking itself seriously for a second. If you liked To Love-Ru or Nagasarete Airantou and just want something easy and fun, this fits that same slot. It's 13 episodes from 2005, based on a manga, and it doesn't pretend to be anything other than a breezy harem comedy with a goofy twist on the isekai setup.