Nine Peaks - Vol. 18 Ch. 156 - Gaku and Kiichi's 2019 Promise

[MangaDex]

 

[BringinTheBeefUS]

if he knows about Gaku's dad, then he should know Gaku will probably be fucked if his dad doesnt conquer all 5 schools

 

[K_Takuya]

Probably the weakest motivation so far, with far too many holes. Like, surely he thought about the consequence of fucking up the timeline.