Tanaka is an interesting character.
Obviously he's not a good guy. He's literally grooming a child and only cares about having sex with her. But it's interesting that his words resonate with Aiko so much, especially when he told her she just wants to be special. Even if he was a pedo, he was the guy she spent the most time with and connected with, so he ultimately was the person who she knew the best and who she, for better or wose, loved, and he knew that too and took advantage of it.
In previous chapters we are also shown Aiko is looking for something special in her life, because everything around her was so bleak. She wanted a special place in the world. But this also warped into a toxic mentality because of her religion, which taught its followers that everyone has to have a unique destiny. In sum, Aiko just never got to learn the tools to cope with the world.
She was ultimately trapped between a rock and a hard place. Never getting to know what a normal life is, she yearned for something to save her, to make her special. It's extremely unfortunate that the man she relied on was someone who never cared about her from the start.
I don't think most people would react like Tanaka if someone came crying to them like Aiko did to be honest. Tanaka just simply never gave a crap about her and once she fell out of line he gave her some harsh words to put her in her place. The words themselves may have been founded in truth, but there's more to the situation that Tanaka is oblivious to. Because even if Aiko was just trying to kill herself for "attention" that is still a cry for help that shouldn't be ignored.
Tanaka's solution to Aiko's problems was to shut her up and tell her to kill her parents if she's hurting that bad. Because to him Aiko is just a sexual outlet, her mental well being doesn't matter. A more reasonable person would focus more on giving her mechanisms to heal and cope with her trauma (and ideally get them into therapy, which sadly in Japan is basically nonexistent).
Tanaka's response being annoyance that she's blaming him is,
at first glance, justified. Aiko's blaming Tanaka for not helping her, when that's something she should be directing at her parents instead (as she does at the end of the chapter), and after that, teachers and friends and authorities. Although, he really should care more about her, given the position he's in as her boyfriend. On the other hand, he shouldn't
be in that position in the first place, given that said position is, like you said,
grooming.
However, she's lashing out with "you needed to help me, why did no one help me" as a general statement towards everyone. She's not really blaming him alone, she's simply saying it to anyone who will listen, and he's the only person who pays even the slightest amount of attention to her. It's pretty obvious why Aiko has given up on her parents, they're the ones hurting her and neglecting her. If your kid is suicidal and feels a guy she met through prostitution is more trustworthy, you're an absolute goddamn failure of a parent. Then there's the cult bullshit going on with her school. And really, even if he was just a complete bystander, he should care at least a little.
Tanaka's words
technically have some truth to them, but in the same way "if you want to stop having suffering in the world, kill all humans" is
technically true when JRPG villains say it. Not to mention he isn't looking at the full situation. Scratch that, he isn't even looking at the situation
at all.
Really, his words are just self-righteous bullshit. He's blaming a victim (while victimizing her himself) as if all the abuse she faces is
inevitable but her reaction is
totally optional and somehow inexcusable. It's like if a someone stabs a person, then complains about the blood. And to add on to what you said about her wanting to be "special" / wanting "attention" - beyond the fact that she still needs help anyway, her goal of "special" / having "attention" is just "I don't want people to hurt me anymore". There's a world of difference between wanting attention as in wanting to be in the spotlight, and wanting attention as in wanting someone to
notice you.
Plus, he's saying "
other people have gone through worse and been fine", when he hasn't been through any of it himself. Even if he
had, that's still no excuse to ignore someone suffering. The type of person to hear someone tearfully ask for help and say "pff, I/others have been through worse" tend to imagine the other person is exaggerating, when typically the person actually downplaying.
I may or may not have a raging personal vendetta against abusers who absolve themselves of responsibility by claiming "
you're the one absolving
yourself of responsibility by asking me to stop hurting you". Especially ones who start the pain olympics bullshit. I also may or may not have shared in Aiko's fantasy towards her parents at the end.
Seeing the suicide attempt this chapter was definitely rough, but honestly it was the sequence last chapter that made me crying harder. The part where she immediately thinks "all relationships are just me being a sex doll, right", runs off, then breaks down crying when talking about having kids and raising them the right way.