 If you liked Glaucos |  ...then you might like Kokou no Hito |
Both leads are stubborn kids who have a natural talent for an extreme sport (free climbing/diving), but their reckless nature constantly puts them in danger as they over-evaluate their abilities
Both has a lot of symbology and approaching unconventional sports, Kokou no Hito is Infinitely superior But I do not see reason for those who liked Kokou no hito not give a chance to Glaucos.
Introverted people who stumble upon their natural talent (mountain climbing or free diving). They don't know their own limits, what of course is very dangerous in sports where if you're alone ànd in trouble, it may cause death or irreversible harm. They lose themselves into the nature, sometimes forcibly shutting off the other people who care about them. *Art is absolutely stunning.