Age gap please!

Here are my top favs~
Check tags before reading
1. A perfect relationship
2. Sayonara Alpha
3. Fushidara na Hanatsumi Otoko
4. Kouguu no Omega
5. Unfather

My old man list

https://www.mangago.zone/home/mangalist/2558323/

For age gaps some of my favorites are -

Koi ga Ochitara and the sequel Koi ga Michitara
Old-fashioned Cupcake
Boku no Omawarisan
Mitsuya Sensei no Keikakuteki na Edzuke
Ore no Buka ga Eroi Mousou wo Yamete kurenai
I Want to Spoil Ikurou-san
On Doorstep
Love in Limbo
Love Nest