Boy I can't wait for this lolicon side plot to end so we can get back to the consenting adult characters.
Not to be all uhmm akschually but Chiru is only 16 herself (with Senri being 18) at the start of the series, don't quite remember how much time has passed since then. So adult might be, at least for the former, a lil generous.
I think a 10ish year gap is way worse than a 2 year gap, specially when one of them is a child.
If you're an adult dating another adult with a 10 year gap, you do you, but if you're an adult dating a child, please see yourself out