Responses
I only know 2 stories
https://www.mangago.me/read-manga/yasashii_pantsu_no_nugasekata/
In this one, the particular scene was around ch 30+
https://www.mangago.me/read-manga/the_place_where_the_wind_blows/
Any yaoi where they leave it in, and they fall asleep? ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄