Since I don't know the exact story, it could potentially be about a figure who met a watery end and was considered beautiful in a way that defies normal expectations. It could be a story about love and loss, where the person who drowned was remembered in a special way that made them seem the most beautiful. It might also be a story with a moral or lesson, perhaps about the transience of life and the power of memory.
One possible theme could be the concept of beauty in death. The idea of the 'ahogado' (the drowned one) being the most beautiful might imply that there is a certain allure or significance to the state of death.
The Kenichi manga can go farther. It offers additional arcs and plot points that aren't covered in the anime. Sometimes this gives a more comprehensive experience for fans.
Miu could be a key character. She might be the one who stays by Kenichi's side constantly, using her skills to keep him as comfortable as possible while he's sick.
The strongest disciple in history, Kenichi, referred to Shirahama Kenichi, the main character in the Japanese manga " The Strongest Disciple in History, Kenichi." The story was about Kenichi, a boy who was originally weak and bullied. He became stronger through learning martial arts and joined the "Liangshanpo" dojo, which gathered the world's top martial artists. There, he received guidance from many martial artists and became a powerful martial artist. The animated version and OVA-version of the manga adaptation were also released one after another.