https://www.mangago.zone/read-manga/true_end_of_those_days/ . Literally the same as this one .
I have a few recommendations... not a lot of them are forbidden love but I'm listing some that may fit into a certain category or just some I found to be very good. Sorry if they aren't what u were looking for
Goshujinsama wa Ouji ga o Suki
Koi ni wa Mukanai Shokugyou
The Omega Takes a Husband
Muri Kon
Love Awakening x Syndrome
Happy End wa Goisshoni
My Hopeless DreamerItoshi no Kemukujara
I Was Reincarnated in Another World and Auctioned off as a Slave
Hey, Prince!
Juanmuqi
Abarenbo honey
Thank youuu (づ￣ ³￣)づ
Hi! Do you guys know story with a similar plot? Like forbidden love but not tragedy or too much drama.