Responses
Think this is a flashback. The beginning of chapter (on classroom door) showed they were in grade 9. Also, Gu Ze was being compliant under his father's "suggestion" (cough*order*cough) which we saw they had a shady relationship previously. Unless there was a time skip, I wouldn't know another explanation for their suddenly talking to each other without the tension.
Wait, is it a flashback or the meantime?? So, our Gu Ze is suffering right now? :'' god..
And I wonder, why Ruchuan's rank is really dropping now. Things happening and going to affect their relationship? Pls protec my babies from such a sad world （/TДT)/