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Did you ever find it? Was it this one
https://www.mangago.zone/read-manga/rainy_season_s_guest/ ?
I think the title is SNOW FAIRY. Check it out.
Y'all does anyone know of a yaoi manga with a guy who's somehow got caught in a snow storm or was it a storm and let inside a house of another guy who lived alone to take shelter. The said guy (who took shelter) was actually also a spider.
I can't remember anymore than this, my memory is so vivid. It's been years since I've read that and I still can't find it