Tensura and Hamefura references?
If this would focus heavily on Tsukasa and Sei's growth as a potential couple this would give off
I Became Friends with the Second Cutest Girl in My Class vibes and I'd welcome that. Especially that part about them sharing hobbies and swapping manga, damn that was super cute. Hell, they can completely forget about the love triangle subplot and just focus on Tsukasa and Sei and I'll still read this.
I'm also enjoying how unapologetically smooth Tsukasa is. Doesn't even matter that he's technically an otaku on the inside with the way he talks, he's rather refreshing for a male lead. If only he can share a bit of spine with his friend. Yuuichi is truly your typical potato romcom protagonist rizzing girls left and right despite lacking the spine, guts or balls to stand up for himself.
Something tells me the Kaori of this world isn't the normal Kaori he knows. How the hell did she get there? This is like the second time she's very conveniently intruded on Tsukasa planning things with Yuuichi. The timing can't be simple coincidence, right?