Koi to Yobu ni wa Sasayaka desu ga

恋と呼ぶにはささやかですが

High school girl Umi Sayama is placed in the care of the neighboring Hiroi family while her mother is away on a long business trip. The Hiroi household is home to Shouya, an eight-years-older figure she admires, and Umi's heart races at their long-awaited reunion. But the Shouya she encounters is completely different from the one in her memories... A faintly sparkling cohabitation story about meeting changed memories once more. (Source: Square Enix, translated)