I only read this manga because I translated sexless as someone who has no genitals (lol) and because some people said the ending is said (note: I hardly ever read any descriptions). Well, after this I thought this would be a great manga, but I was wrong.
The story is about a university student who is scared of women and about a teacher who is afraid of men. They decide to become sexless friends meaning friend who don' t have sex (lol) and try to improve their behaviour towards the other sex.

The story is your typical clichéd rom-com, meaning the main characters are incredible clumsy (how many boobs did the male mc touch again?). There's also a nice amount of tragic in it to make the story more interesting.
As for the characters, they are your run-of-the-mill type, but I don't think it was meant be another way.

Anyways, to make this short: if you enjoy reading rather plain stories and like to see some boobs, you might read it. But if you think this is might worth reading because you got spoiled of the end, don't do it.