Nerd Project!!
The top is not rlly a loser but he envy the bottom and his popularity
A Tiger's Den
Personality-wise, top is a gangster boss but a total loser for the bottom. Bottom has him by the balls fr.
Sorry if you meant legit popular/loser like high school stuff.
https://www.mangago.zone/read-manga/ero_yume_aquarium/
https://www.mangago.zone/read-manga/i_want_to_be_your_first_love/
https://www.mangago.zone/read-manga/the_next_door_neighbor/
https://www.mangago.zone/read-manga/my_guildmate_next_door_shortcut_scans/
https://www.mangago.zone/read-manga/the_best_luck_of_my_life/
When I think loser I think simp so hopefully this is what you meant.
Top isn't a loser but , Codename Anstasia amd Dear 0.0
Bl recs where the top is a loser and the bottom is cool pls