Thanks for the double release, and happy new year to all the great contributors!
It seems underwear (of girls) is one of the heavier themes of this manga. Not that I'm bothered by it, but I'm more accustomed to mangas of higher or lower levels of ecchi than this one. As far as ecchi/fan-services goes, I think the treatment in Idol A is better than this. (I guess a guy with a bigger fetish on ladies underwear will surely disagree with me.)
Another bothering issue that the readers have to accept is that the main girl (Yuho) has been constantly (sexually) harassed by both her own elder brother and the main boy (Atsushi)'s elder brother ghost (Kyu). By "harassed" I mean being peeked while bathing or changing, indecently touched while massaging etc. Compared to those things, having underwear stolen is almost nothing (except for the inconvenience). Sorry but I'm a bit old-fashioned-minded when it comes to those issues.
Oh and finally, sorry for the ignorance, but what's the major difference between the "LQ" & "HQ" versions? They are similar in both file sizes and image sizes. Would appreciate if anyone could explain it to me.