can someone recommend me some complete romance manga?

Try this https://www.mangago.me/read-manga/boku_girl/ (=・ω・=)

Futari ashitamo sorenarini
Horimiya
Natsuyuki rendezvous
Sekine-kun no koi
Will you marry me again if you're reborn
Taisho otome otogibanashi
Haruka 17

https://www.mangago.me/read-manga/lovely_again_today/
https://www.mangago.me/read-manga/you_got_me_sempai/
https://www.mangago.me/read-manga/cheese_in_the_trap/
(sort of dark)

https://www.mangago.me/read-manga/lovely_again_today/
https://www.mangago.me/read-manga/trainees/
https://www.mangago.me/read-manga/finally_living_together_with_my_anti_fan/
https://www.mangago.me/read-manga/paperbag_kun_is_in_love/
https://www.mangago.me/read-manga/trace_of_you/

https://www.mangago.me/read-manga/l_dk/

Bl, Gl, or Straight