He's more "big" rather than chubby, but it's rlly cute and it has an anime as well
https://www.mangago.zone/read-manga/oremonogatari/
https://www.mangago.zone/read-manga/itonami_itonamezu/
https://www.mangago.zone/read-manga/cutie_and_the_beast/
https://www.mangago.zone/read-manga/accel_world/
https://www.mangago.zone/read-manga/mori_no_takuma_san/#:~:text=GO-,Mori%20no%20Takuma%2Dsan,-Start%20Read
https://www.mangago.zone/read-manga/asahina_wakaba_to_marumaru_na_kareshi/#:~:text=Asahina%20Wakaba%20to%20Marumaru%20na%20kareshi
Thank you so much guys!!! (づ￣ ³￣)づ
Straight romance with a chubby male lead? I always only see chubby girls (apart from bls) （￣へ￣）