HeartfeltHeart is a novel game created for Windows.

The main character, Kairi Honma, is a 17-year-old boy with a heart condition. He has extreme concentration, his mind is sharp, and while he is thinking, all of his senses are closed off. He is trusted by his friends at school, but on the contrary, he is disliked by his teachers because he is too smart, and he has beaten his homeroom teacher many times in the past.

In the past, he has repeatedly argued with his homeroom teacher, and after repeated arguments with Kairi, the homeroom teacher quits the school because she is tired of teaching. The heroine, Eiri Fujiki, is a new teacher who is newly appointed there.

Kairi has a strange sense of deja vu about Eiri, and since meeting her, his thinking time has become extremely long.

* Where does Kairi's ability to think come from?
* Is it related to a heart defect?
* What are the feelings he has for Eiri?

The player becomes the protagonist, Kairi Honma, and uncovers the mysteries imposed on him.

Life, intelligence, mind and emotion. A science fantasy that speaks to all.

[From official website]