Review Detail of D_Wolf in Worldwide Classchange: I Got Five Elder Sisters Supporting Me While I Level Up

The first 10 chapters introduce the 5 sisters and their classes, then the MC finally shows up with his class. It being a bard is considered the worst class. It seems that he hides his bonuses from his sisters that fully support him as even at 20 chapters in they are all about supporting their weakling brother who has a pathetic class. First off these girls are supposed to be his sisters that fully support him, why can he not trust them enough to actually sit down and discuss his advantages? Maybe because he is male and Chinese.