Locked alone in the Library, well not with a key but more of a psychological kind of way since he wants to live down that embarrassment that just happened.
Calling himself stupid for accidentally kissing that lady above the lips, he feared the most what Ada will feel about this when she finds out.
Sure that Ignite lady just tried to make the young Electus comfortable and even called herself his sister, but it was still very inappropriate and most saw it happen.
So he plans to tell Ada himself before she figures it out from someone else's banter. Banter can get a lot more dangerous so he can't let it run wild and risk his bond with Ada.
She is the best Human being he ever met, the epitome of perfection so such a risk can never be granted with the capabilities to grow bigger.
Yes well he will tell her a bit later, now he wants to live down that harsh embarrassment. Ever since the Clawed Demons started attacking Gaster Kingdom he hasn't been able to put in much training.
