Sensei, Fuufu ja Dame desu ka?

https://www.cmoa.jp/title/262774/

A tender, sweet, and ticklish love story about a couple with an age difference who are making all their firsts together!

Kinari Tamura, a student at an art college, has a crush on
The one-sided love of Kimari Tamura, a student at the University of Arts, is her childhood friend, Takaomi Kuze, who is the instructor in charge of her seminar.

I thought I had decided to keep this love affair a secret for a long time, but
However, she unintentionally confesses her love to him out of anxiety that she does not want to be separated from him.
However, Takaomi's reply was unexpectedly a proposal to "become husband and wife"!