While his wife was visiting her parents during her pregnancy, Yuuta diligently handled the household chores. Living alone for a long time made housework and cooking no big deal, but being alone was still lonely. Just as he felt this way, his wife's sister Rin came to check on him. The house became lively again after a long time, and Yuuta welcomed Rin enthusiastically… But Rin's true intention was to satisfy her desires with Yuuta…
