Kami no Shizuku

The story revolves around Kanzuki Shizuku, a young man who was estranged from his father, a world-famous wine critic. When his father passed away, he left behind a wine collection worth a fortune, but in order to inherit it, Shizuku must solve a series of puzzles left by his father to identify 6 wines. His competitor was Tomine Issei, a prominent wine critic, whom his father adopted before his death.