7 is baed + enjoyment factor while with all above stuff now i know that you might be thinking that you must give it 10 nah but not giving reason are :
1.It is a manga and in manga more of the flow must be depicted through the pictures it is a novel adaptation so i think that as a reader wound up betwwen picture and conversational aspect , depth of story and emotions are outright but this doesn't fit the genre of manga original novel or a movie may do a better work with the script.
2. again conversation/narration length is to long that is not fit for manga.
3. use of heavy words to shorten the length of sentences these were able to depict in conscience of what they talk in 30 minutes but takes me sometimes 3-4 to re read it to get sentences were not enough to express whole feeling ,takes time to connect to character therefore decrease tne pleasur of reading.
these are the reasons why i was unable to percieve story as i should be, in depth as well in contrast of characters
if you want to enjoy it read novel version that is translated or watch a good movie based on it with avid readers with good language grasp in literature reading manga may do the trick.
oh and plese reply wether it was helpful or not