Subaru to Suu-san - Vol. 6 Ch. 38 - Dawn

[Septazia]

as he reverts at 24 back to 12, I'd say it's been 12 years

Well if this isn't their first time, surely they could have gone at it once he was....16 maybe.

 

[CT-9904]

Don't tell me this is the first time he got laid in however long he's been living

What if, all this time, the reason he keep reverting his age is because. . .