I'd like to talk about my views about DaiLui and why i feel like it could be mutual.
Like, i do believe in the Rui → Daisuke order because it's more accurate and cuter, even if a bit of cliché. But I also like Daisuke → Rui route, it has its own charm and comedy in it.
But Rui is not like Daisuke, of course, and they differ between how they react to people having romantic interests on them.
Rui might not be oblivious like Daisuke, he's pretty well aware of people's feelings so if someone ever confessed to him, he would be in denial due to his past experiences and awful trauma he had. He's still learning to socialize and to interact with others, he's not used to people really liking him. So it will be a bit hard but you can get there, Daisuke-kun!
Meanwhile, and as everyone is well aware, Daisuke has zero awareness when people like him if you don't tell him (or even, if you tell him, he might not believe it either). Since he's dense af, there's a lot of work to be done here in this relationship so good luck, Rui-kun.
... And then I realized that i just described mutual pinning for the first time in my life.