His GirlfriendAitsu no Kanojo; アイツノカノジョ; Someone's Girlfriend; His Girlfriend; 他的女友; Zijn vriendinnetje; Sa petite amie; La petite amie de ce mec; Pacarnya Dia; Його дівчина; Bạn Gái Bạn Thân; 那家伙的女朋友

It's April of my third and final year in high school... But the beautiful girl I have a crush on is my best friend's girlfriend. Thus begins my year of treading on the dangerous ground...---- (https://www.sunday-webry.com/episode/3269754496618662695)