Koharu's admiration is very on point. Eruko mananging to be so pretty and in great shape despite all these years as an almost shut in is indeed quite wonderous.
@Jackist: You hit the nail on the head. This manga is progressing so wonderfully, I have no complaints. Eruko herself is gorgeous, adorable, no monstrous flaws added for "realism"; Hoshi is neither an idiot, milquetoast, nor closeted--it's all good.