Here are a few~
1. Back to school
2. Heart Stain
3. Yarichin ☆ Bitch Club
4. 19 days
5. 18 Unlimited
6. Nan Hao & Shang Feng
7. Men's Wear Store and "Her Royal Highness"
8. Caste Heaven (this one is very dark)
9. Cherry Blossoms After Winter
10. Never understand
11. Semantic Error (this one is of college life but its so cute! Give it a read, you won't regret it)
12. A Guy Like You
13. Megumi and Tsugumi
14. Shima-chan Chi no Tsugai Jijou (Yaoi)
15. Hidoku Shinaide
Any school life bl manhua?