Sana as your Professor who is touchy around you

Mrs Minatozaki, she is single, a 39 year old Professor.

Chou Tzuyu, a former student of Mrs Minatozaki, a 37 year old journalist and CEO.

Tzuyu visited her old university to pick her sister.

Sana: Tzu? Is that you?

Tzuyu: ah! Hi Ms Minatozaki!

Sana: you can call me by my name, hehe. Who you looking for?

Tzuyu: my bad. Oh and I'm looking for my sister, where is she though?

Sana told her that she's in the convience store nearby the school, she told her that she can wait.

Tzuyu: oh okay.