So... the "thief" leader suddenly becomes a super berserker warrior. It seems that autor-san didn't know how to progress that story and he/she needed a cliched change.
First volume was great, utterly ridiculous, frenetically and sexy humour. The second one wanted to develop a generic ecchi harem battle type plot.
It was the best to drop it at this point.
Nice casual story with good drawing.
Although in the last half it feels like authors didn't know how to handle the plot and development is inconsistent.