probably he heard something jichan said and leading to misunderstanding :^(
Spoiler (some parts may be jumbled but this is the gist of it)
Mido gonna get adopted by a pervert man and jichan overheard this. He highly against it and make a plan for them to run away. He asked mido to wait somewhere while he's gonna get some stuff at the orphanage.
Unfortunately he went into a fight with the reverend, and he ran away. Jichan realize he didn't have any money and try to steal someone's wallet, and got beaten up by it. He's woke up in a hospital and mido wasn't there. I think mido got adopted by a gang or something. He thinks jichan abandoned him
Ow,Did he say that he's gonna be adopted by a perv so they need to run away?
Then why is he doing all this to Jichan?