Hoshikawa Hikaru, an ordinary space warrior, his only specialty is - being bald!
One day, his second-hand spaceship lost control and crashed, directly smashing through the roof of Wanshiwu, and owed a huge debt.
As a result, this unlucky young man was forced to sign an "agreement to sell himself to repay his debts" and became the fourth member of the Master House (also a human punching bag/complaint practice target/bald reflector).
"This is not debt repayment at all, it is purgatory on earth!!" Xingchuanguang shouted (reflected above his head).