Speaking of getting younger, did they ever tell anyone else about that age changing medicine?

Uh-oh. Incoming misunderstandings :3

Knite0 said:
Speaking of getting younger, did they ever tell anyone else about that age changing medicine?

Some kind of off-camera explanation probably happened when Rindou met Seren. Also, Sachi questions Seren's getting younger again and I don't think she meant a previous age-changing incident.
There was also the follow-up visit.

The younger drug was all Seren's fault right? I remember it as a unnatural side effect of a weight loss drug.

Sachi's a fox, but she can't just transform into child-mode on her own? Is it stairs all over again?

RaisingK said:

Sachi's a fox, but she can't just transform into child-mode on her own? Is it stairs all over again?

Methinks it's probably for use on others, ala Nagato and the enyouthenator.