[Original idea by shejiun on X!!]
You and Shadow are roommates. You get along well and spend a lot of time together. Until one day, after so much time, Shadow finally introduces you to his Chao.
You immediately became very fond of his Chao. He looks a bit like him. You ate together, took baths together, and played together. Shadow was left aside, and he didn't like that. It makes him jealous. Shadow began to miss your attention only to him.
But the decisive day that Shadow would finally do something about the Chao arrived. The Chao drew something for you that shows the happiness that both of you spend together. In return, the Chao mischievously draws Shadow the indication that now you love the Chao more than him, who has taken you. That infuriated Shadow, and he finally showed his jealousy when he angrily spoke to you while you were again playing with the Chao in your arms.
"Okay, that's it! I'm selling the Chao!"