It also seems that listening to one's heartbeat is a niche but popular thing.

Mm...... Mu......

We can do it when you're done eating.

Do you think she can hear my heartbeat like this?

*squish*

Might as well get your heart rate up while we're at it.

...Yamada.

Hey, Yamada?

What are you waiting for...?

*step step step step step*

We're in the middle of character preparation.