Chapeau ! It's rare to see manga / manhwa talking about mental illness and doing it in a way that smartly go with the stereotypical character you see in anime / cartoon.
Bibi is your typical yandere cute girl. In other works, the author would only use her as "the crazy cute girl who must be killed, trapped or healed with love?" but here the author use this stereotype and acknowledge her mental illness and also advise you to seek help from people who care for you and potentially from professional. And the same go for Amy, the stereotype of the timid cute girl, who suffer from a PTSD and have social anxiety.
Really a good message to spread.... And I should follow it....