First, I knew about Kou then Kousei and now Kakeru and then it hit me, that these three form a deep puzzle.
When I came to the realization that their names all start with the same letter — letter K, I’m like ‘what kind of enchantment is this?’ It feels like it’s meant to be, maybe intentional or perhaps pure coincidence.
Besides the first name initial, these three have issues that concern their mothers but of course not in the same exact manner — one’s mom passed away due to an illness and he can’t forgive himself because he feels responsible in taking care of his mom as he promised to his brother when their parents got divorced, thinking if only he paid more attention then he would have noticed it (Kou); the other whose mom is so ruthless that she beats him which ends up with the son finally blowing up and cursing that he hopes she dies and ultimately it does happen (Kousei); and finally, a boy’s mom who’s sickly, also divorced when he was little and who needed her son to be with her at the hospital, to which he initially agreed but changed his mind to hang out with his new friends and informing her in a not so pleasing manner, which was followed by the mother breaking down and committing suicide (Kakeru).
All three have high sense of guilt, self-hate, and extreme trauma — depression. They deal with it in different manners but similarly, their behaviors and perspectives have all changed.
Out of the three, I’d say Kakeru has the most difficult depression because he’s reached that suicidal tendency stage unlike Kou and Kousei. Then again, what Kousei said to his mom is more distressing than what Kakeru did but Kakeru ended up feeling more guilty than Kousei as people have different reactions to such situations. Kousei, I think, at the end of the series, might have subtle suicidal tendencies after suffering a double blow when Kaori passed on but I guess Tsubaki is the key so that he could avoid it.
On a side note, Kakeru and Kou could really pass as twin brothers, seriously. I instantly thought of Kou the first time Kakeru made an appearance except the hairstyle and the eyes. Even Futaba and Naho are so alike other than the hairstyle and color and their eyes.