What's the strangest concept Ты have watched?

Gintama (Гинтама) is for me

~A story about samurai, aliens, robots, androids, japan, ninja, pirates, Космос pirates, giants, hobos, poop, demons, monks, anime, manga, guardian spirits, Gods, swords, old men, prostitutes, monkeys, Gorillas, cyborgs, parody, Ghosts, Host, Hostesses, dick jokes, жопа, попка jokes, Odd jobbing, paying rent, running away from paying rent, wizards, games, dating sims, and many еще XD

The only Аниме that made me scream "WHY!" and "WHAT THE HELL!?" so many times

Durarara!!

The whole time I was like WHAT THE FUCK IS GOING ON.
and all those plot twists that came at Болталка moments and that I almost didn't notice made it all worse xD
I fricking Любовь it!

I would have to say Хеталия Beautiful World was the strangest for me. Especially episode 11. But I was already so invested into it that I couldn't stop myself from watching it and loving it.

Gatchaman Crowds. I literally started this 2 days ago, am on episode 10, and am still scratching my head wondering what in the name of Alchemy is going on. The story is kinda typical: normal girl gets superpowers, joins super-team, and kicks alien butt. Sorta. However, the characters are what make me wonder if the creators just went on a giant acid trip and decided to make an Аниме afterwords. Let's see... we have a high school boy who carries a katana almost everywhere; a girl obsessed with scissors and has nothing close to an inside-voice; a dandere girl in a bikini who can heal people; a gay half-alien; a panda-like alien; a crossdressing 18 год old who's practically taken over the world and who's only friend is a computer system; and the Joker's bisexual alien cousin. ...um... WHAT?? I almost didn't watch it, but the opening... gah, that opening refused to let me give up, much like K, another weird anime. The whole plot is really cliche, to be honest, but it's lovable. Well, except the crossdressing 18 год old. He's sort of original for this kinda plot. I think.
What can I say, it grew on me. I Любовь it so far and the characters are all really memorable. And really, really messed up.

Ben-to... Really the whole plot is about people fighting to obtain half-priced bento at the supermarket. Everyone takes it seriously and there's even a set of rules that the contenders play by while fighting.

Meganebu!
It's pretty much the title. A club. About glasses. That's it. That's the entire show.
If Ты don't wear glasses Ты don't even appear as human until Ты put them on. Glasses. There are ghosts. Tears are shed. A board game comes to life. Food. Glasses.

Glasses.