Our boy is clearing out his life. He quits his job, sells his collection (of something,) and empties his bank account to leave an envelope full of money next to a sleeping person.
Ishida has a chance (or maybe not chance) encounter with Shoko outside his sign language class. He wants to return her communication notebook, which he's held on to all this time.
Shoko has fallen for Ishida. She gives him a gift and tells him she loves him. Out loud. This is no good, because her pronunciation is off enough that Ishida thinks she said "The Moon" and doesn't understand.
(Moon/Love puns are traditional in Japanese for some reason.)
Ueno tries to engineer a reconciliation between Ishida and Kazuiki Shimada, who was Ishida's best friend in elementary school, but threw him under the bus.
This fails.
Ueno blames Shoko for... roughly everything. She pulls her aside and suggests a peace treaty.
This escalates into the destruction of her hearing aids, and the administration is called in. Ishida's coconspirators sell him out.
Ishida's mother pays Shoko's mother for the hearing aids, and (it seems) takes physical punishment as well.
Ishida becomes the target in class.