I certainly recommend 'em if you would like to read a good & light ecchi manga.
The real tension in the manga is during the beach chapter.. (I lol'ed when remembering 'em)
But the real problem is the manga is too short. Yeah, I really very much like if the mangaka considered to continue this one.

I read this because I like this author. I'm not gonna say this was gonna be a great series, but certainly a fun one. One of those comedy mangas that actually makes me laugh. The problem is...it was too short. I'm sure it could have been extended a bit. Overall, a fun short read.

WTF 9 chaps from WATASHIYA Kaworu she is 2 good for 9 chaps still not bad ready funny + ecchi if u like this things it's ok simple 1h of your time to finish this maybe less still i like it

A really cute ecchi series about a clueless girl, who always says the wrong things, has no self-awareness, and has very strange beliefs. She’s also in love w/ her coworker who is extremely serious, and whom she thinks doesn’t even see her as female.

Kogane’s comments are so wrongly misplaced that they are hilarious at times. It’s also cute that her coworker is having his own self-confidence problems because he thinks Kogane doesn’t even see him as a man. Overall, both characters are cute and it will be interesting how the little sister will try to hook up her dimwit big sister to the gloomy and serious guy she wants.