So, here are a few more of my theories, because Suguriko have completely stolen my heart.
I genuinely believe that Suguru started going down a dark path the moment he witnessed Riko's death and saw how horribly people treated her afterward. It felt like no one really mourned her properly except for him. I'm not counting Satoru here — everything was far too complicated for him at that point, lol.
And when I realized just how deeply it affected Suguru, the headcanons practically started writing themselves.
My favorite one is that Suguru and Riko are reincarnated as ordinary people. They can’t see curses, they know nothing about jujutsu, and they get to live simple, carefree lives.
They’re born in a small town where everyone knows each other and end up growing up next door. Since Suguru is two years older than Riko, he naturally becomes the one who scares off the bullies she keeps picking fights with. Maybe he also scares away a few of her admirers along the way, but who could really blame him?
He always found her fiery personality endearing — the way she'd stubbornly lift her chin and pout whenever she couldn't win an argument against him. He'd simply nod along and buy her something sweet afterward to make up for his "crime" of proving her wrong.
So when Riko turns seventeen and Suguru is nineteen, he finally makes his feelings official and starts courting her properly. The entire town practically breathes a sigh of relief when they become a couple, because Suguru finally stops glaring at every young man who dares to get within five meters of Riko.
After finishing their studies and no longer having anything tying them down, the two of them begin to travel. First across Japan, then eventually around the world. Their parents can barely keep up with the constant stream of postcards and photographs sent home by the happy couple.
In the last photo, standing in the middle of a field, Suguru is hugging Riko from behind, his face buried in her hair while she laughs brightly at the camera. One hand is stretched out in front of her, proudly displaying the engagement ring on her finger.
And the sun shines warmly over them, lighting their path and blessing them with the happy future they were always meant to have.