Hi

Looking for same story/plot or something similar like

Class de 2 Banme ni Kawaii Onna no Ko to Tomodachi ni Natta
Yume Miru Danshi wa Genjitsushugisha
Dou ka Ore wo Hanatte Oitekure
Nyanta to Pomeko Imasara Shinjiteiru to Iwarete mo Mouteokureda
Soredemo Boku wa Kimi ga Suki

Even better if the MC is a loner/doesn't stand out/self sacrifice individual and FMC is a popular girl.

I'm fine if it's LN or WN too..

Rokkon Shojo
TeppenMezashiteTondeAruYo
Let justice be done, though the heavens fall

Of the 3 I've only read a bit of Soredemo Boku wa Kimi ga Suki, but if you're looking for romance with popular female lead and unpopular male lead, you should try Boku no Kokoro no Yabai Yatsu.

Thanks for the suggestion.
I had read this around 2 years ago but it doesn't appeal to me.
Would give it a try again.

Rokkon Shojo
TeppenMezashiteTondeAruYo
Let justice be done, though the heavens fall

Maybe 3D Kanojo, there is unpopular male lead, popular female lead, a bit of a love polygon going on and some drama.

Ohh nice one.. Looks interesting. I would give it a try. Thanks!

Rokkon Shojo
TeppenMezashiteTondeAruYo
Let justice be done, though the heavens fall

The Girl Downstairs might be what you are looking for.

Great suggestion! But unfortunately I'm not really familiar with Manhwa. Sorry.

Rokkon Shojo
TeppenMezashiteTondeAruYo
Let justice be done, though the heavens fall