I always thought it was weird they spent half the show building up the connection between Izuru and Teoria and then when they finally reveal she's essentially his biological mother the two never interact after. Izuru himself is never told, right? Just that Asagi is his brother. I would have liked to at least see a scene of the two together after he found out but oh well. Besides it's Izuru so all that would really happen is he'd start going around calling her mommy like a weirdo.