Instead of attending the school event, the two spend their time together in a "prolonged sleepover" style, engaging in "non-daily" activities like playing video games for hours on end until they complete them.
The flashback highlights Kou's long-standing tendency to "go with the flow" and his deep loyalty to Mahiru, contrasting with the more rigid expectations placed on them by the adult world. Instead of attending the school event, the two
Mahiru faces intense pressure from his mother and initially decides not to attend the upcoming school field trip. Upon hearing this, Kou decides he won't go either, stating that "if [Mahiru's] not going," there is no reason for him to go. Instead of attending the school event