bro there’s so much content on here i think i know something with that i will look anonymooseygoose
there’s “make me sweat” (bl), “Ase to Sekken” aka “sweat and soap” (josei), and the one that i think fits ur question the most: “Kokuhaku Shitekita Yatsu no Seiheki ha”(bl)
additionally, i think anything made by author “SAKISHITA Senmu” or “Fuerzabruta” may work for u? hope this helps!
any bl with armpit stuff.. or like sweat.. if you think its weird please just dont talk to me(⊙…⊙ )