Hoshitabi Shounen

A planet of slumber where most of the inhabitants have fallen asleep due to the poison of the "Tobias Tree." This is the story of a star traveler, registration number 303, who travels to the planet on behalf of the Planetarium Ghost Travel company (a.k.a. PGT, Inc.) to record and preserve its culture. The story is about the people and things 303 meets, his encounters and partings, the mysteries of the "Tobias Tree," PGT Inc., and himself......

(Source: PIE International, translated)