Bousou Honnou Melancholia暴走本能メランコリア; Berserk Instinct Melancholia

From AQUA Scans: Cornered by delinquents, Katanabe Shino was just waiting for her end... until Tachibana-kun, her bad-tempered classmate, saves her. She then decides to give him a not so chaste "thank you gift".