0510 au where Shidou kinda adopts Es but it's not official because Es still is with their parents they just spends most of their time living with Shidou. Kotoko is just his messy situationaship whom he forgets to introduce Es to, so at some point when Es goes over to Shidou's after school and they just sees Kotoko also at Shidou's they freak out cause they don't know this lady. Then they call Shidou and he basically realises, "Shit I never told either of them about each other". So when he gets home he introduces them to each other and Kotoko is like "You said you had no kids", and he's like "It's complicated"















