im fine with some comic relief, but honestly sigurd and his crew are close to ruining this arc if not the whole manga, that barrel crash shit is ridiculous and robs this arc of a lot of dramatic tension
i mean it was clearly established even at the start of this arc, that iruma even now in his "evil phase" still helps out the minor staff at the school. not really a macguffin
it's the opposite, you should be conditioning every day and only shampooing like two or three times a week. otherwise your hair will be really dry, and it also has the inverse effect of making your body produce more oil to counteract it