I was a huge fan of this, I was willing to wait for it to develope, but chapter after chapter is like the author was just giving us an average harem, I mean Hinata the MC is passive most of the times, act more like Bell is his friend rather than lover, from the moment they got together is like nothing changed, and then they kept introducing new characters.
All of this could have been setup, I am fine with her looking like a yandere as a consequences of breaking from one universe to another (kinda like in FRINGE), but as it is, I don't believe in the menace and the stakes don't feel that important.
Right now Bell and Hinata relationship is almost one sided.
Maybe the author should have stuck to the art, let someone else write it, what's the point of his talents? The most they have been used is for occasional panty shots, but that's just boring and feels too random and gratuitous.
Make your ecchi tie to the narrative otherwise it might as well be a random doodle.