i don't know why, but i hate this library girl. Maybe it's the hypnotism? it's a trash trope, hope the author keeps that bullshit out of this manga for good.
@mage_goo i've seen it pop up in multiple ecchi/rom-com manga. But yea, it's usually a male thing. Not necesarily a character trait, but definitely a trope in that it shows up in different places as a common theme for a chapter/chapters. See as same level as "the beach chapter", "the festival chapter", "the test of courage chapter", et al.