One of those few ecchi manga that deserves to be read not just for its fanservice, but for its characters.

Condensed verion:

Why you may pick this up:
-Fanservice
-Elyse
-Interactions between characters
-Elyse X Kohta
-Interesting setup for plot

Why you may skip this:
-Heavy Fanservice (Arguable)
-Weak ending


Long version:

Story-7: There is actually a story, and it is OK, if somewhat lacking in the ending. MC is (another) useless bum who is hopeless in life. Then, in a freak accident, the Queen of terror becomes sealed inside his... balls. To prevent the end of days, he shall not come. Yes, the story is as weird as the title makes it out. As the story goes on, demons (who all happen to be female, for some reason, and yet this isn't a harem) attempt to seduce MC in an effort to make him release his load and finally have demonkind rule the world. No, you are not going to get an epic 'hero defeats the demon lord and saves the world' plotline from a title like 'My balls', but the story is serviceable, and gives many opportunities for ecchi scenes. Nothing special, if not creative, but it isn't bad either.

Characters-9: This is where, in my honest opinion, the manga really shines. We have the MC, Kohta Satou, the useless bum who destroys the world if he ejaculates, and one of the lesser demons sent to make him do just that, Elyse*. Kohta has a crush on his colleague, Minayo, but being the useless bum he is, he does not have the balls(?) to ask her out. As the story goes on, we see the MC try to hold it in as hordes of demon girls use an array of fetishes to get MC to blow his load and release their queen, while Elyse slowly falls in love with MC, and Kohta begins to make his move on Minayo. The chemistry between Kohta and Elyse is some of the best I have seen in ecchi romances. I genuinely felt the sparks fly between them, and I found myself rooting for Elyse even as Kohta progresses further with Minayo. Its one of the few reasons you may want to pick up this series. Well, that and maybe the ecchi.

*just going to rant about Elyse here. She is one of the most cutest, beloved, and most expressive tsundere pettanko i have seen in a long time. Every time she is with Kohta, there is never a dull moment, from scolding each other, to dates, to her crying when she sees her beloved Kohta enjoying sex with someone else and being unable to do anything about it. Ok, rant end, on with the review.

Art-8: its an ecchi series, so the art is usually good, by default. All the curves are there in the right places, and all the facial expressions complements the action going on. Characters are easily told apart, since all the different demons look like ecchi cosplayers.

Enjoyment-9: I came for the story, and stayed for the characters. I was expecting a typical harem romcom where MC is so dense it is unforgivable, and I will then default to admiring the ecchi that this manga is priding itself on. What I got was an MC that becomes more likeable and becomes aware of the girls' feelings, a lead female that is just downright enjoyable (see rant), and good fanservice in between.

Overall-8: If you want some quality fanservice with characters that are likeable, pick this up if you can get past the fanservice. The story is simple but doesn't commit any grave sins, but lets be honest, you are here for the ecchi and characters, not the story. IF you cannot handle fanservice, skip this, but only after reading through the first few chapters. It is entertaining, enjoyable and has memorable characters let down by an ending that doesn't do the romance between Elyse and Kohta enough justice.