Here are a few!
http://www.mangago.zone/read-manga/joou_to_shitateya/ (if you like this author, her book Jackass has this trope too, but not the main couple)
http://www.mangago.zone/read-manga/himono_tokodoki_shanairen_ai/
http://www.mangago.zone/read-manga/mujaki_na_wanko_to_nekokaburi/
http://www.mangago.zone/read-manga/soredemo_yasashii_koi_o_suru/
http://www.mangago.zone/read-manga/sumanai_masumi_kun/ (I love the daughter in this)
The first story in this. It also has an age gap. The MC dates his mother's ex so if that would bother you, please skip.
http://www.mangago.zone/read-manga/boku_no_shiru_anata_no_hanashi/
older uke’s are my weakness ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄