Riding his bike to school, Koichi accidentally runs over a bag that was in the road that had a cat inside. Koichi is instantly overwhelmed by what happend. Then suddenly, a man named Tamami Kobayashi appears. Despite it being an accident, he demands money from Koichi, saying that he'll use it to bury the cat. Koichi can't process what's going on, but Tamami keeps pushing that he can't just leave after what happened. Koichi is filled with guilt, and then suddenly, a giant lock pops out of his chest...
Yes, Master Koichi! Anything! 
I'll be your underling!
نعم يا سيّدي كويتشي، أي شيء
سأكونُ تابِعاً لك
Ja, großer Kōichi!
Ich werde alles für dich tun!
¡Sí, señor Koichi! ¡Haré lo que sea!
¡Seré tu súbdito!
¡Sí, señor Koichi! ¡Haré lo que sea!
¡Seré tu súbdito!
Oui, messire Koichi !
Sì, signorino Koichi!
Da oggi mi consideri al suo servizio!
Sim, Sr. Koichi!
Eu serei seu vassalo!