Art-wise, I have to say this manga offers quite a clean and eye-pleasing artstyle.
Now, on to the story. As stated previously, the MC starts off as being average at most. But what makes up for it is that he is rather strong when he works in a team with his (male) childhood friend.
Then comes the turning point where the real enemies of this manga attack. As expected, the MC proves to be useless as he gets separated from his friend.
However, that was until he actually became angry and turned berserk. Now that part of the story turned out to be badass and the MC powered up significantly. He literally killed his enemies which showed his determination and that was probably the best part of the manga.
Then after a certain plot twist, the MC gets beaten and becomes weak once more. However, it is pretty obvious he won't turn berserk anymore, which just annoys me because from now on, he will keep on depending on others to fight, which just shows how weak he is. I think it would have been better if he actually succeeded while in berserk mode.
As stated previously, there's also the problem of this manga's chapters being sooo short...
And finally one of the main problems for me : the main love interest in this manga gets netorare'd every two chapters after the turning point. If you can't bear that, then don't bother reading it.
(Netorare basically means that the girl (usually) gets raped in front of her male friend / boyfriend or cheats on him in front of him)