Koisuru Futari wa Kiba wo Kakusu: Gap ga Arisugiru Couple no Hanashi

Yukiya Sengoku and Airi Ichijou are high school students who met online and became close friends through offline meetups. "I want us to get even closer." Yukiya and Airi sense the beginnings of romance, but each harbors a secret they can't tell the other—Yukiya is the leader of his local delinquent all-boys school, and Airi is the leader of her local delinquent all-girls school! Their true identities absolutely must not be revealed!?

(Source: Kadokawa, translated)