If this had a continuous series, I would have kept watching. However, I guess this was a short one that is about a guy whose twin brother committed suicide, and he tried to do the same as he was continuously compared by those around him and those who knew his twin brother, then he ran away from home, and ended somewhere he didn't know. And then, the jellyfish man teaches the protagonist a lesson about life and that he should write to his family and not think about himself. I guess it was an emotional anime, but I still wish there was more.

The plot seems kind of good, it's nice to see an animated version of someones perspective of living somewhere they don't know, away from their family and working at a diner. But, there was only one short episode and I wish there was more to it than that.

I think I've seen this before, however, I never wrapped my head around the suicide part, since we're not educated about what suicide is at a young age and only taught about it when we go into high school or something with extra curriculum classes with teachers talking about it, like a mandatory thing. It felt like that in this anime, but with the student being the boy that was lost and the jellyfish man being the teacher that teaches the protagonist about what to do and what he is doing. I mean, I might be overthinking this, but he might not have been trying to do what his brother did and could have been just lying there for no reason. But, that might have been what he was trying to do and many other things weren't explained in it, or was not expanded and kept short, they could have purposely missed out other information and kept the episode short. I wish there was more because it ended very soon, or too soon actually. It's a pretty old movie though.

I'm not sure if the keyword 'suicide' is against the rules, but that was what happened or was displayed as in the movie itself, and I'm not sure what other word to use, like "he committed the unthinkable"?, but that wouldn't make sense, what is the 'unthinkable', it could be anything.
I'm going to mark this as a spoiler too, I said too much.