The story begins with a mom leaving her son, Pian, alone at home, reminding him to be careful and not make a mess. However, Pian soon realizes someone is trying to break in and calls his friend Amato for help. When Amato arrives, they discover the intruder is Janitoor, a retired cleaning robot and former Space Arena champion.
Janitoor is determined to capture Pian, who has made a mess in his house. Amato and his friend Deep try to stop Janitoor, but he proves to be a formidable opponent. After a series of intense battles, Amato uses his MechaBot to defeat Janitoor, but instead of destroying him, he decides to let him live and befriends him.
Janitoor is grateful and helps clean up the mess in Pian's house. When Pian's mom returns home, she is impressed with the tidiness of the house and thanks Amato and Deep for their help. The story ends with Janitoor being captured by Amato, but not before he is allowed to clean up the mess he made during the battle.
Here are the key facts extracted from the text:
1. A mother is late and leaves her son alone in the house, despite the rain.
2. The son claims to be a big boy now and does not need anyone to keep him company.
3. The mother has hired 10 bodyguards and 10 butlers for the son, but he has sent them all back.
4. The son is left with $10,000 by his mother.
5. The son orders something online for lunch.
6. The mother warns the son to watch his spending.
7. The son is told to be careful and not make a mess.
8. A robot, MechaBot, is introduced.
9. A character named Amato is called to help someone named Pian, who is being threatened by an unknown entity.
10. Pian has sent away the bodyguards and butlers hired by his mother.
11. Amato and another character, Deep, go to Pian's house to help him.
12. They find Pian's house in disarray and discover that someone is trying to break in.
13. Amato and Deep use MechaBot to try and capture the intruder.
14. The intruder is revealed to be a robot named Janitoor, a former champion of the Space Arena.
15. Janitoor is trying to capture Pian and is destroying the house in the process.
16. Amato, Deep, and MechaBot work together to defeat Janitoor.
17. Janitoor is defeated and thanks Amato for being an honorable opponent.
18. Amato captures Janitoor and allows him to clean up the mess he made.
19. Pian's mother returns home to find the house tidy and thanks Amato and Deep for their help.