A one-minute prank that understands both fandoms better than most actual crossovers would. Shaft swaps Chitoge into Senjougahara's verbal brutality and puts Hanekawa's deadpan precision into Onodera's earnest spaces, and the joke lands because it respects what makes each character tick. The cruelty is that this April Fools trailer has more creative chemistry between two universes than most studios manage in full seasons.

Shaft marks its 40th anniversary with an April Fools' Day gag: a trailer for a crossover anime that was never actually made. Released online as a single short piece, it is pure comedy, and the whole joke rests on promoting a project that does not exist. Treat it as a playful anniversary prank from the studio rather than the start of a real series.