Based on a shounen gag manga by Masuda Kousuke serialised in Monthly Shounen Jump.

Uro Yamada works as part of the "Hero Retirement and Return to Everyday Life Assistance Agency," which takes heroes from another world back to Earth and helps them reintegrate into everyday life.

The young Kimball Kinnison is leaving home for a wider education when a Galactic Patrol ship crashes on his family's land and the dying pilot gives him a mysterious Lens. Half-sentient, the Lens now implanted in his hand becomes the focus of changes in Kim's life including his father's death, a space battle, and an encounter with Galactic Patrol nursing officer Chris. Impelled by the Lens, he discovers a new world of experiences opening before him and he risks his life to save Chris and the Universe. (Source: AniDB)

This work focuses on environmental issues from the viewpoint of insects. In a refreshing twist, the central character miniaturizes, unlike the conventional hero who grows ever larger. From this perspective, the world looks different and unfamiliar. This work enables the reader to see that the world around is quickly moving towards destruction. (Source: en.tezuka.co.jp)