The eldest son. 32 years old. 163cm. Calm and hates losing, yet also has a side that makes him the beloved target of teasing from the others. He has a high-pitched voice.

The second son. 29 years old. 170cm. While he is a gentle and calm "healing type," he also possesses a strong core and a "gutsy" and "serious" personality that takes on any challenge positively. He likes beer and yakitori. He can cook and play the guitar. He is the one you are most attached to.

The third son. 27 years old. 178cm. A serious and hardworking person with a pure and kind heart, he also has a unique, particular side and a talent for comedy and gags.

The fourth son. 24 years old. 179.3cm. An innocent and cheerful personality who faces everything head-on. While he is a mood maker, he is extremely stoic and passionate about his work—a multi-talented person who gives his all to everything. He graduated from a music college and has perfect pitch. He is a great singer.