Sensei, Ima kara Otoshi ni Iku ne

Chizuru, a teacher, has for some reason been getting hit on by Mioka, a newly hired rookie teacher who joined the school in April. Mioka handles his classes with ease and is constantly surrounded by swooning female students, so why would someone like him be interested in Chizuru...? Chizuru assumes Mioka is just teasing him, but it turns out Mioka was once his student back when Chizuru was a student teacher!?

"...I've been serious about you this whole time. You still haven't figured it out? I want to be your boyfriend."

Chizuru's disciplinary guidance can't keep up with this younger man's obsessive devotion!

(Source: Libre, translated)