With that out of the way, apparently the whole thing with the manga was Yu4(arguably Reiji too?) traveled back in time from the future. Manga ends with them returning to the future and in the ‘present’ Yuzu meets Yusho, who in ‘present’ is her age.
This meeting is heavy fucking implication that manga Yuzu is in fact the manga Yuya/Yuto/Yugo/Yuri brothers’ MOTHER.
Yuzu begs Yuya to enter the ikemen pageant because the prize is 60 kilos of rice AND the duel school would get a lot of publicity. Yuya’s hesitant, but Yugo’s like HMPF, I CAN TOTALLY WIN FOR YUYA. But Yuri’s like “You, an ikemen?? Please, you probably can’t even win a contest as classless as this.”
Then Yuzu reveals the contest is a swimsuit contest. Yuya, Yugo, and Yuri all start freaking out, saying NO WAY!, and Yuzu tries to reason with them–until Yuto steps up like “Hm, it can’t be helped…”
Cut to the actual contest. Yuzu doubts if Yuya can win, and Shuzo’s like “Yeah, Kurosaki and Sawatari have surprisingly nice bodies”.
But then Sora announces REIJI as the winner.
Yuto and Sawatari are like “The hell? You’re not even in a swimsuit!”