I want to give it a 8 because of the bittersweet ending however because of the emotions it made me feel I give it a 9. Prepare a box of tissues or get some toilet paper because that ending will bring out the waterworks! I hated the fact that it was an open ending yet also sort of like it because it makes you feel stronger emotions. It is one of those manga's that leaves you desperately wanting an answer as to what happens in the ending while also thinking about it and feeling empty inside or like something is missing. Definitely recommend! That aside the artis really nice & the chemistry between the characters is also really good!!!