Let me begin by saying I liked this manga. Tsukimi is adorable, and Kuranosuke is my favorite and the NEETS are great, they make me want to live in Amamizukan. All the jellyfish art is just beautiful as well, and the way it translates to the clothes is such an interesting idea. (I would 100% buy basically every dress.)
A quick warning: don't go into this expecting romance! At the beginning, you might easily think 'oh! this is going to be about relationships!' While they are touched on a little, they are definitely not the main focus of this manga, and ultimately we get very little progression or resolution on that front.
There were some things that bothered me, which I will list below.
At one point, a character drugs, strips, and pretends to have had sex with another character. No one ever confronts the attacker about how wrong that was, nor does she ever regret doing it - and no one tells the victim that he has been wronged either. (Even though everyone is aware that the victim can't remember the event and was incredibly unlikely to have initiated anything.)
Another time, a character is taken against their will by someone with a sexual interest in them - and then forcefully kissed by said abductor. This was even creepier because the abductor did not speak the victim's language, and the victim was taken to another country where she could not speak the language.
Both of those events go on for several chapters, and I was pretty uncomfortable reading them. Neither thing is ever really resolved either - in the first case, the attacker continues to pursue the victim for quite some time before eventually disappearing; in the second the victim is rescued by a friend, who then takes her out to party for a night in the foreign country before eventually flying home. (And then in the last chapter the abductor shows up again with the intent to live with the victim??)
Again, this is shoujo manga, so neither of those things are really unusual - it's just how they are presented and resolved that I take issue with. If the victims in either case had secretly liked and/or grew to have a relationship with their assaulter, that would be typical shoujo and therefore expected - it's fiction, whatever. Or, alternatively, if the victims experienced lasting emotional damage (i.e, being scared of being intimate with others in the future or something) that they then had to deal with and resolve themselves, that would be fine too. NEITHER of those things happening (the situation while it's happening to the character is scary, but post-situation it's treated as not being important at all) throws me off.
Tl;dr: There's some pretty dark, depressing stuff in here that isn't really presented as being dark or depressing, and also is not resolved. The clothes are cute though, and I liked most of the characters - and it ended on a happy note with a nice message that actually had me tearing up a bit, so that was great. I'd say read it, but be prepared to be confused/irritated about how some things are handled 🙂