Take to Kota to Aoto
Complete | Akabeko | 2000 released
Guys wife leaves him and his kid only for his kids teacher to be a former classmate he bullied. Kinda moves too fast but ig that fine, they both assume they dating. No mix up or anything just together by chapter 2 and they kinda follow about a year into their relationship and a little after. Sweet story but not necessarily the best. Liked it well enough but nothing to write home about.
Katenkouru ni wa Mada Hayai