It's a bit vague but it's a manga with a dark haired boy learns superpowers from a blonde lady, boy is originally from rural town but goes to find blonde lady with a city with a large white tower in it and he joins her groups who all have powers. I think the title was only one word.
From where I remember leaving off
*spoiler*
Last chap I remember they got stuck in a timeloop trying to save people, going back in time power was from a girl with glasses and she had to place a candle in a circle and could only go back into time to that checkpoint.
It kinda just popped back into my memory, its from a while back but from what I remember it was like set in olden japan but like early 1910s vibes, but an orphan girl who was adopted by this grandpa, but the grandpa dies and the girl wants to die too to be with him but gets taken in by this blonde guy as a bodyguard? I think. However essentially its because she grew up in the mountains and is really agile and good at martial arts but is a bit airheaded, and the blonde guy is like the cold type initially but starts falling for the girl but in kinda like a tsundere way.