I had high expectation for this manga because of all these ratings. I'v read enough of SOL, romcoms and dramas, but let me say this manga has couple of one of the most annoying characters i'v ever seen. That said, support division and Kaizaki with his own drama are written pretty good and natural. That's why the beginning, before volleyball tournament and last few dozens chapters are really enjoyable and emotional on par with my expectations. But the middle of the manga is absolute mess, mostly because of the rest of the cast.
If author just sticks to romcom and moderate drama it would be really good, but this work pretends to be kinda serious and dark, so mangaka's trying to portrait a lot of very dramatic moments and deep psychological conflicts. And... she is absolute unable to handle such things. There are a lot, A LOT of very forced and unnatural moments, but main issue is how the characters act during these events. Seems like the only way to develop conflict author knows is to make characters act like retards. It's not swear word nor exaggeration. They actually act like 6-7 y.o. children! I know it's manga, but there are must be the limits! This is supposed to be serious dramatic seinen! Characters behavior during their hard times is so forced, annoying and cringe-worthy that most of "dramatic and emotional moments" in the middle of the manga evoke only one emotion: irritation. After every new "conflict" I had urge to drop the manga because of stupidity of situation. Thank goodness in last chapters focus changed to Kaizaki and manga became good again.