There's also eng translation of the novel in NU. Completed if you buy the chapters but the free ones are being released on a schedule and its not that far ahead from the adaptation. Atleast the novel actually had better pacing, the manwha actually skips or changes some little details
That's not how it went in the novel ・゚・(。>д<。)・゚・ where tf did that "prove it" come from??? Makes no sense at all