The phrase "Shinseki no ko to o tomari dakara de na" (often abbreviated or misspelled in queries as "lle") likely refers to a specific adult-oriented or niche anime/manga scenario. Based on common Japanese linguistic structures, the title translates roughly to Because I'm staying over with my relative's child..."
If you are looking for a "paper" (as in a digital copy or physical print), these works are typically found on online manga repositories or the artist's official social media and support platforms like Fanbox or Patreon. shinseki no ko to o tomari dakara de na lle
“先日は新戚の子とお泊まりさせていただき、ありがとうございました。子どもが『また行きたい！』と大喜びでした。” (“Thank you for hosting the sleepover with our relative’s child the other day. Our child was overjoyed saying, ‘I want to go again!’”) The phrase "Shinseki no ko to o tomari