Looking for smut, age gap, older man straight couple OR smut, age gap, older seme on BL/Yaoi

since you mentioned niichan ill include these tw toxic age gap with older seme:
-The Perfect Relationship
-because of you

not much smut I think tho oh and i noticed niichan isnt here on this website anymor :O

Thank u so much for the recommendation! Yeah niichan not showing anymore here so I read it somewhere else coz someone recommend it at the time that I'm looking for toxic/trauma BL ahahahahha

https://www.mangago.zone/read-manga/how_sweet_is_a_sugar_daddy/
https://www.mangago.zone/read-manga/love_me_doctor/
https://www.mangago.zone/read-manga/dangerous_convenience_store/
https://www.mangago.zone/read-manga/unfather/

Great! I appreciate it! so excited to read it! thank u! :)