AverageWeirdo's manga / #age gap(77)

"Upon entering high school, Osamu is meant to move into a new place to start living alone. However, when it burns to the ground three days before he is due to move, he ends up living at Takara's house, his step-uncle who is 12 years older than him. Unbeknownst to Takara, Osamu has been in love with him since they first met over ten years ago. Buoyed by his unexpected good fortune, Osamu confesses his love in the heat of the moment… An emotional love story under one roof between a high school boy, single-minded on first love, and an uncle who lives life at his own pace."

"Sometimes one splash is all it takes to make waves. Swimming prodigy Woo Seungwon, whose very being is vast and endless like the ocean, runs into former a-list singer Doh Si-on. Si-on, now a businessman trying to stay afloat, is doing his best to move forward with his life; but the weight of the world only drags him down, as if he is struggling to crawl through a swamp. Taking an interest in Seungwon, Si-on offers him the opportunity to make some extra money as his housekeeper…and perhaps do a little extra work on the side…"