JUR-521 Has anything changed from back then? An affair of infidelity with childhood friend Mahiro-neechan, drowning in youth... Ichira Mahiro.

I moved to Tokyo for a job, but working at a black company ruined my mental health, and I ended up returning to my hometown after several years. Unlike the hectic city atmosphere driven by anxiety, the countryside was peaceful... Then suddenly, a woman called out to me. I suddenly felt like I had time-traveled or something, and who do you think it was? It's Mahiro-neechan from my childhood! It really is her, isn't it…? She looks exactly the same as she did back then. She's almost 10 years older than me… Apparently, Mahiro-neechan moved back to the countryside a few years ago after getting married. Before I knew it, I had grown taller than her, but our relationship remained the same, and she still treats me like a kid…