Shijou Saikyou no Deshi Kenichi, Girls of the Wild's Recommendations
While they have different premises, both series involves action/martial arts as a main concept. The MC from both series gets involved with characters of various backgrounds but possesses extraordinary abilities. Throughout both series, they strive to protect people they care about and discover their potentials. Recommended for fans of action and light comedy.
Both have guys who were bullied and are determined to get stronger. Both guys are also taught by various masters while attending high school.
The main protagonist starts out weak taught martial arts by some of the best martial artist in their own fields. The hero dramatically grows stronger. Both are action-packed!
Girls of the Wild's is a manhwa.