In the meantime, to be helpful, I will provide a on how to analyze an unclear or fragmented topic, plus a short sample essay on the importance of clarifying research subjects — which you can adapt once you have the correct title.
The closest thematic match is a niche doujin game titled (Sleepover Pretend) where the protagonist's cousin's child stays over, leading to comedic chaos. shinseki no ko to o tomari dakara de na gat repack