Gunjou Other Half

Synopsis

"I found you, my fated person" I thought it was something that existed in a totally different universe from mine... Natsume Naganuki is unexpectedly assessed to have transitioned into an Omega. Unable to catch a break, on that same day, he meets his "fated pair," Kouta Arima. The naive and innocent Arima, who transferred into his school, remains undettered and constantly whispers his love to Naganuki. Naganuki had spent his life peacefully until now, but before he knows it, he's already swept up by Arima's enthusiasm...?! (Source: Shibuya Rokkasha, translated)