Responses
If it meets the criteria here are some
1.theres a sequel for this
https://www.mangago.me/read-manga/hush_today/
2. https://www.mangago.me/read-manga/here_u_are/
3. https://www.mangago.me/read-manga/between_the_stars/
4. https://www.mangago.me/read-manga/the_story_about_you_x_me/
5. https://www.mangago.me/read-manga/heesu_in_class_2/
Something sweet and youthful(?) like Nerd Project or Green Apple Paradise? without unnecessary drama and focuses on the development of the main characters' relationship.