Did you guys know that the Onee-san series had been picked up for serialization by Weekly Shonen Magazine before you started translating it? If not, then that's an amazing coincidence lol.
If you guys like this type of series and are ever looking for another short series with a similar overall feel, check out Mako-san wa Shindemo Jiritsu Shinai. It's also in Weekly Shonen Magazine, and is about a capable high school-aged guy who takes care of a lazy college-aged girl. Shenanigans ensue lol.