what's the point of the 7 wings, he is basically nerfed and how did the so called strong willed sister end up like this, nothing in this manga makes sense at this point
@Murewa it makes perfect sense, the Sister lost her will to fight back the siblings, because they almost break her spirit completely, if it wasn't for the MC, she would had become a puppet that would had been glad if they let her even speak. the MC resolve brought back her fighting spirit but not enough to actually fight, but instead she humiliated herself by begging to let the MC free.
this past year, she didn't get stronger, the siblings made sure that she would become strong enough to not be able to fight them but become stronger than the average students.
i really hope they didn't ruin her grow as a Winged Swordsman
it also makes sense that the MC lose control of his power, the 7 Wings are so powerful that he can't control it right away and become OP, he grow to get used to the power is more realistic than what happens in other stories