Kindan wa Hatachi ni Natte Kara

Hinako has lived a smooth sailing life. She became a teacher, which was her dream, but contrary to the expectations of those around her, her days were not going well. Feeling that her students were scary, she was feeling down alone in the park with no one to talk to, when a mysterious handsome 20-year-old man called out to her. For the first time, she was able to share her wounds and feel healed, but in fact, his true identity is...!?

A legal but forbidden love begins with this 20-year-old boyfriend...!

(Source: Flower Comics, translated)