https://www.mangago.zone/read-manga/the_law_of_being_friends_with_a_male/
The main couple has really cute story but the side couple is kinda long
https://www.mangago.zone/read-manga/just_twilight/
Another story of positively yours author's but kinda more dramatic which makes it better to me than positively yours, but I don't know if it would be your likings
https://www.mangago.zone/read-manga/awesome/
This one is super light and funny
https://www.mangago.zone/read-manga/my_introverted_boy/
The romance is yet to bloom
https://www.mangago.zone/read-manga/a_child_who_looks_like_me/ it kinda gives me similar vibe of positively yours but obviously different
https://www.mangago.zone/read-manga/paperbag_kun_is_in_love/
https://www.mangago.zone/read-manga/will_you_marry_me_again_if_you_are_reborn/
This two are manga but super light
I just read positively yours and i really liked it so if anyone has straight romance manhwas like that or just light romances in general i'd appreciate it, thanks