Best shonen ever made is a seinen. Think about it
It ain't seinen if we don't see a flashback explaining how saitama is a celibate hero because he tried to fuck a girl once and completely disembowled her with his dick, and pulling it out reduced her to molecules
Best love story ever made is seinen. Think about it.
Niget-Ai (I Want to Escape - Love - Nigger)
A boy falls in love with a girl.
Unable to confess, he is gifted by a deus ex machina with the girl's phone number. Never minding the strange area code, he immediately calls her, and is overjoyed to find out that she has a crush on him as well.
But, the next day, when he recounts the previous day's confessions to the girl, she only looks at him with a perplexed expression. After some investigation, he finds out that the girl he called is not the same girl he fell in love with. In fact, she doesn't exist in this universe at all. She is the girl's alternate universe counterpart, who has fallen in love with the MC's own AU self, who too is blissfully unaware of her crush.
Hijinks ensue as the two strike up a deal to give each other their darkest, most private secrets in order to equip the other with the weapons they need to conquer the heart of their other selves. While the two chase their respective loved ones, DRAMA ensues as they begin to fall in love with each other instead and question the NATURE of LOVE.
Now with its own OP: https://www.youtube.com/watch?v=4NShEKYoPXw
And ED: https://www.youtube.com/watch?v=IIX9aoN7g4o
I think shounen and seinen means shows for boys and girls respectively.
Could be wrong though, I don't speak weeb.
Also I don't see what girls would get out of it. It has less gay undertones than TTGL, and even that was only really popular with guys.
wait, so OP is saying that this is a mature anime for men?