According to a report by The Korea Herald, Cha Eun-woo's agency, Fantagio, confirmed that the actor-singer was baptized at a Catholic church in June during his mandatory military service. He received the baptismal name John the Apostle.

Military personnel in South Korea are allowed to take part in religious activities organized within their respective units while in service.

Cha Eun-woo enlisted in the South Korean military on July 28 and is currently serving as a member of the Army Military Band. Under South Korean law, all able-bodied men between the ages of 18 and 28 are required to complete mandatory military service.

Despite his enlistment, fans have continued to see the actor on screen. His Netflix series The WONDERfools, opposite Park Eun-bin, premiered in May after it was first announced in November 2024.

According to Netflix, the series is "set in the doomsday-fearing year 1999" and follows "a group of awkward townies who unexpectedly gain superpowers and fight villains threatening the peace of Haeseong city" in a comedy action-adventure story.