Yuri hypnotized Toono in an attempt to help him rehearse the play (ch.24 pg 8-9), unfortunately it made Toono unable to memorise the script at all (ch.25 pg 4-12), but they didn’t know it back then. Only much later Tamura realized it (ch.25 pg 40).
Because Toono couldn’t remember anything Yacchan got mad and Toono decided he didn’t want to be in a play cuz he was letting Yacchan down and left (ch.25 pg 18-21). Yacchan tried to make Toono change his mind but didn’t succeed. This made him even more mad and he exploded in the hall (ch.25 pg 24-28). Everyone saw it and apparently someone took a video then (ch. 25 pg 28)
Chapter was fun but is anyone else confused about the whole hypnotizing bit? And when did they take a video of yacchan