To be honest, I found the gag a bit dull, but Harumi's bra on the chapter 1 splash page was rendered in such loving and immaculate detail, that I spent the rest of the chapter thinking about it and mostly skimmed over all the dialogue and groping. Like, wow. It's like if Kaoru Mori drew a manga about lingerie, or something.
...Actually, I would totally read a Kaoru Mori manga about lingerie, come to think of it...