https://www.mangago.zone/read-manga/on_doorstep/
https://www.mangago.zone/read-manga/koi_wo_suru_tsumori_wa_nakatta/
https://www.mangago.zone/read-manga/boku_no_omawarisan/
https://www.mangago.zone/read-manga/yamada_to_shounen/
https://www.mangago.zone/read-manga/himono_tokodoki_shanairen_ai/
https://www.mangago.zone/read-manga/aozora_no_sunda_iro_wa/
https://www.mangago.zone/read-manga/don_t_come_near_my_10m_boundary/
1st couple: https://www.mangago.zone/read-manga/katakoi_alliance/
2nd couple: https://www.mangago.zone/read-manga/love_awakening_x_syndrome/
1st couple: https://www.mangago.zone/read-manga/konya_mo_nemurenai/
2nd couple: https://www.mangago.zone/read-manga/kimi_to_kore_kara/
Any yaoi where the main characters have kinda big age difference? For example like the side couple of bj Alex