How about having Dinner together?
Complete | Park See In | 2000 released
Gokushufudou: The Way of the House Husband
Ongoing | Oono Kousuke | 2000 released
2020-12-20 11:24 marked
Aki wa Haru to Gohan wo Tabetai
Ongoing | Taji makoto | 2019 released
Mai-chan no Onee-san Shiiku Gohan
Ongoing | Akitsu kio | 2019 released
the age gap is only 4 to 8 years (don't know the high schoolers age), for a kid it's a lot but when they are adults it won't be a problem ╮(￣▽￣)╭ ^.^
Machi no Yakuza to Panya-san
Ongoing | Ameno Gigi | 2000 released
Shinmai Shimai No Futari Gohan