The final question embedded in the keyword is an invitation without a destination. You cannot literally “go see” this otouto because there is no consistent referent. And that is exactly the point.
Recently, the phrase has shortened. On Japanese meme forums, you’ll now see just used as a sarcastic invitation to look at something underwhelming.
To a native speaker, the end of that sentence ("kona new") looks like a typo. To a learner, the whole thing might sound like a puzzle.
The series, with its blend of comedy and heartwarming moments, offers a unique look into the daily life of its characters and their relationships. While it may not delve into complex societal issues, it provides a delightful exploration of family and friendship, making it a beloved series among fans of slice-of-life and comedy genres.