ASTEON.

ASTEON (아스테온) is a South Korean actor-idol group managed by Megameta, a company founded by former Fantagio CEO and founder Na Byeongjun. Another profile detail is that The group plans to promote in various fields and connect with fans through different contents. Additional background says that Their debut was originally supposed to be through music web drama ‘매니저과 1등에게 구원받았다 ‘ in fall 2023 and the original soundtrack “Promise” recorded by the original four members, but these plans fell through. The profile also notes that After some line-up changes, the group made their debut through the OTT drama ‘Will You Be My Manager?’ on December 12, 2025. Members include Ahn Junwon, Yang Junbeom and Nam Minsu.