ASTRO's Cha Eun-woo says he wrote 'Entity' to "help keep” his late bandmate Moonbin’s “memory alive”.

The K-pop star was tragically found dead at his home in Seoul, South Korea, last April, aged just 25, and Eun-woo has revealed his emotional debut solo EP was penned from Moonbin's perspective.

Appearing on South Korean talk show 'You Quiz on the Block', he said: “Last year was a very difficult year for me.

“I wrote the lyrics after days and nights of shooting, recording, trying to channel Moonbin’s perspective.

“People tend to forget too easily. That’s just really upsetting to think about. I believed that by writing about him, it would help keep his memory alive for a longer period of time.”

The 27-year-old singer-and-actor was told he could take a hiatus following the tragic loss, but instead he took on the role of Sun-yool in the K-drama 'Wonderful World', because the character reminded him of Moonbin.

He explained: “I felt a connection to Sun-yool… his backstory struck a chord with me.

“I felt that I needed to pull myself together and work hard so that my world wouldn’t collapse. Although my agency said I could take a break, I ended up doing Wonderful World because I wanted to.”

The series tells a story about an author and professor whose life falls apart after her son is killed in a hit-and-run accident. She seeks justice but ends up committing a crime herself and is sentenced to prison. The show explores themes of grief, guilt, and redemption.

It ends with the poignant line: "May the world be more peaceful and affectionate to those who have the pain of loss."

Eun-woo declared: “I know this is something that will stay with me for the rest of my life, so I’ll strive harder. I’ll live well, for Moonbin’s sake."