the comedy tag for this novel only applies till volume 2

Many people seem to misunderstand the ending and believe that Haruka has actually lost her memory but from some of the hints we see [Shigure saying she can't get a read on her sister's emotions in the hospital and Haruka's silence when the MC leaves the house on Friday at the end] it is implied that she is most likely acting to prevent Hiromichi from abandoning her as she believes him to be the only important thing left in her life and thus uses her excuse of amnesia to tie him down to her. The MC does not really realise this or maybe he just doesn't care as we see at end that everything in his life has become monochrome except for the Fridays where he gets to meet Shigure. IMO the author ends the story in a very interesting way in contrast to the usual happy ends and it kind of does make sense. The readers and the MC underestimate Haruka's obsessive love as her love for the MC was twisted in a way and she was only really looking at his past self but she she is Shigure's sister and blood doesn't really lie and she is obsessed to the same degree as Shigure. Shigure herself is also quite twisted as she likes the MC suffering for her sake and breaks the MC completely to make him obsessed with her. The sisters are equally messed up and ultimately we end up with a ending in which the MC will almost certainly suffer till his dying breath, his price to pay for his mistakes and for loving Shigure. I would honestly love to write more about this novel but words alone cannot describe my emotions for the ending so I will end it here.

Shigure loves her sister and initially wanted the relationship between Hiromichi and Haruka to go well, to the point that she planned to form a relationship with the school's famous playboy so that Haruka would worry less when she finds out that Hiromichi and Shigure are living together. However, Shigure saw Hiromichi and Haruka kiss, she realized her love for Hiromichi.

I want to keep it short and not write war and peace. (Hope I can across clear.)

Obviously, Haruka has some real deep psychological issues that really cause her to fly off the handle on occasion, as seen across the volumes, but volume 4 really cranks up the instability to 10 and turns here into a manic-depressive-maybe-bipolar individual. The relationship of Shigure and Hiromichi moved along by the end of the third vol and it continues along until a not-well individual comes creeping along. Haruka's suspicions lead to her eventual discovery of her sister's betrayal. Fast forwarding to the ends of the vol, there is a back and forth between all parties and this leads to a meeting where MC and H seemingly moving on from each other, only for Haruka to get into a traffic "accident" soon after. MC feels it was brought on by him. The tremendous guilt follows him, this leads to the ending where he continues to date Haruka and eventually makes a family (with a kid and everything) with her after college. (She also conveniently suppressed or lost her memory; the MC does not know which is which.) BUT, he continues to have a relationship with Shigure but only in secret. So let me get this straight, he is somewhat miserable, not feeling the same love he feels when he is with Shigure (as he states in their secret rendezvous in the end of vol) but cannot really leave Haruka because she might go insane, and he also has a kid. I guess us Shigure fans should rejoice? She won! Yay! I did not like where any of this went, like at all. (If you snooped around and found the images, the last image and scene in the vol is of Shigure (with the ring the MC gave her) and MC (now the tired, family guy with Haruka) sharing a moment together alone in secret in their love nest.) Anyways, I stayed for Shigure and the goat character designs and art. It was too bad the conclusion was not to my liking. *Originally was a 2 star, I though that was a bit harsh. For all the insanity and the ending that I did not like, it was enjoyable in a "what the hell is gonna happen next" sense.

ending is yet another cliffhanger and poor, poor Haruka.

To put it in a really dumbed down phrasing, this is essentially glorified NTR (or at least its heading that way) with heaps of sugar stacked onto it