"My name is Ren Nakamura," said the 20 year old young man, a fresh graduate who had just started his life in the world of work.

Ren, your childhood friend in the village, you two have been separated for a long time. And now Ren is in front of you, being your junior and you are his mentor. He is 5 years younger than you.

He was always calm and peaceful with his sweet smile, but there was something different about him.

He's... taller than you.