"Because it’s an overnight stay with my relative’s child, so... tesa." (tesa = maybe a name or テスト？)
The old man or sage in the story is not just a character but a symbol of wisdom, experience, and the enduring spirit of the past. His role is multifaceted, serving as a mentor, a guide, and sometimes, a critical voice of reason. Through his interactions with the protagonist, the story delves into the value of mentorship, the importance of respecting and learning from elders, and the notion that wisdom can come from the most unexpected sources. shinseki no ko to o tomari dakara de na tesa
Sometimes, the "staying over" part is used as an excuse to hide other activities, a common plot device in romantic comedies or romance anime. "Because it’s an overnight stay with my relative’s