I'm Getting Married to a Girl I Hate in My Class

I'm Getting Married to a Girl I Hate in My Class is also listed as Class no Daikirai na Joshi to Kekkon Suru Koto ni Natta. on some trackers — same show, different title convention. It's a TV series across 12 episodes out of Studio Gokumi. It's finished airing, so the whole thing is watchable start to finish.

On the shelf it sits under Comedy and Romance — worth knowing if you're comparing comedy anime specifically. If I'm Getting Married to a Girl I Hate in My Class works for you, HAIKYU!! and Rascal Does Not Dream of Bunny Girl Senpai are close matches — see the full related list below.