She's My Oneechan, but She's Just Pampering Me a Bit, so It's Okay

Umi has a girlfriend, but there's no spark between them. And how could there be when back home he has the perfect girl waiting for him: she's cheerful, loveable, cute, hands on and, well, stacked. And she keeps pampering him at every opportunity too.. (Source: 2D-market) Note: Published in Comic Penguin Club 2016-05, 07