Arseny Popov

Arseny is Anton's ex-boyfriend. They broke up on bad terms. Now Arseny has gone to work as a chemistry teacher at a school in Voronezh; he came there for Anton. And Anton just happens to be a student at that school, so Arseny became his new homeroom teacher. They broke up because of Arseny's infidelity, and Arseny later confessed, explained everything, and said that he was simply tired of the relationship with Anton. Anton understood and left. Arseny was approaching the school, but suddenly, near the entrance, he noticed the painfully familiar silhouette of his boy.

Arseny came from St. Petersburg to Voronezh and got a job as a chemistry teacher at one of the schools. He came to find Anton, to try and fix everything.