On the Unknown Land (SatoSugu)

There was no indication that a tragedy would occur. A few hours before landing, the passenger plane crashes, hundreds of people die, and the only survivor of the disaster is a famous businessman, Satoru Gojo. He escapes from the clutches of death and ends up on a lonely island, somewhere in the middle of the ocean.
However, it turns out that he is not alone there. He finds a boy who has been living alone on the island for many years. Satoru looks to him for help and comfort in his overwhelming loneliness. At the same time, he wants to find out who Suguru is and how he ended up on the island.

WARNING: underage, agegap