My actual canonical interpretation of SatoSugu?
I believe they were the bestest of friends, inseparable soul mates who were mutually in love with each other, but never confessed the depth of their feelings, never discussed their relationship, and never actually made anything out of it.
I believe that Suguru had a massive crush on Satoru throughout their high school years. Satoru was more dense on the other hand and did love Suguru but didn’t know how to place his feelings exactly. Suguru was always by his side and that was enough, he felt secure, so why look into it deeper?
After the trauma from the Star Plasma Vessel mission, Suguru was heartbroken that Satoru left him alone a lot. He missed Satoru and spiraled, self-isolated, started becoming obsessed with his own self-talk about ‘monkeys’ and ‘creating a new world with sorcerers only’. He and Satoru both became self-absorbed. Suguru lost that crush and admiration he had for Satoru even though he still loved him. He wanted his own goals more. So he left.
The second he left, I bet that’s when Satoru realized what Suguru meant to him. That’s probably one of the reasons that Satoru is stuck in the past, because he finally placed his feelings for Suguru, realized he was in love with him, and kept replaying those moments they had together, realizing he never noticed Suguru sending signals, mad at himself for never noticing. He regretted it so badly that he just couldn’t stop living in the past with Suguru. If he’d just paid attention, if he noticed Suguru’s signals, his spiraling, maybe he could have stopped it.
That moment where Suguru returns to the high school to declare war only to leave again, when Satoru watches and watches, (according to the JJK 0 Light Novel) his “eyes kept following the shape of Geto’s soul”. He couldn’t look away. He was filled with so much regret. His entire creed is to raise strong sorcerers together so that no one has to be alone the way Suguru and he ended up.
And when the time came for him to kill Suguru, because last words are so important to him, he finally told Suguru what he should have told him when they were high schoolers. “I love you.”
Suguru, who’d long buried those feelings, probably realized that the things he’d told himself about how Satoru viewed him were wrong. This whole time, Satoru really did love and trust him still. That’s why he smiled. He was loved in return.
“You should at least curse me a little at the end.”
He wishes Satoru would have hated him because now he’s filled with regret. If only they’d had talked sooner, none of this would have happened. Suguru had always placed emphasis on ‘found family’. We see this when he calls Kuroi “Riko’s family” and when he adopts Mimiko and Nanako, as well as the rest of the sorcerers/curse users he rounds up for the Night Parade of 1,000 Demons. With that said, I know for a fact that when they were in high school, he saw Satoru as his family. He saw him as home, as safety, as love.
Really, the only time that he and Satoru aren’t putting on some sort of act is when they’re alone together. It’s strange to see the two of them so serious, especially Satoru, who deflects with humor like his life depends on it. But it’s fitting. They’re just comfortable around each other, there’s no need for masks. They never even seriously raised their hands against each other, nor fatally hurt each other’s family/students.
Now, fast-forward to a year later in Shibuya, when Kenjaku uses the love Satoru and Suguru have for each other against Satoru. How does he know seeing Suguru would have such a drastic effect on Satoru that it would immobilize him completely? Did he watch from afar? Did he keep tabs on them? Or did he see Suguru’s memories somehow? Could he feel how Suguru felt when around Satoru? I’d like to think it was both—Kenjaku kept tabs on them before Suguru died, and gained access to his memories after taking him over.
He even knew the tone Suguru used to use for Satoru’s name. The soft way he called his name. He knew the only thing in the entire world that could stop the strongest sorcerer in modern times was using the love of his life against him.
The smile Satoru had when he thought it was Suguru makes me believe that the only thing he wanted was to see him again.
Then, when he realized it wasn’t him, Kenjaku said “how sad, you don’t recognize me?”
As if to say Suguru would be devasted that Satoru didn’t recognize him. Kenjaku knows how Suguru feels about Satoru.
Then Satoru calls him on his bs and he says “creepy, how did you know?”
Creepy?
The only other time Kenjaku is creeped out is waaaaaaay later in the manga (spoilers ahead) when Satoru sets the fight day to Dec 24th Kenjaku acknowledges that it’s romantic, and that “having a date with him on the 24th gives him the creeps”.
Oh, I know he’s grossed out with how much they love each other. Like. How the hell else do you interpret that???? Come. On.
Add in when Suguru somehow comes back from the dead for a moment and tries to choke his own body to save Satoru. Kenjaku is baffled—that’s never happened before. That is a demonstration of love everlasting, absolutely.
Then you have Shoko’s “I’d never fall in love with either of you, but you were still never alone” to SatoSugu, basically confirming that she knew the two of them shared a romantic bond that she couldn’t replicate the depth of.
So. Yes. They were very very much in love with each other and to this day Satoru loves Suguru with every fiber of his being and lives his life dedicated to atoning for his (self-perceived) failures to Suguru. He thinks about him everyday. He says he was his only friend. He has Shoko, Ijichi, Mei Mei, and Utahime and yet he only sees Suguru. He only sees Suguru.
