Will Yeeun be returning as the solo artist HA:TFELT? That's the question on fan lips amid the singer's suggestive Instagram post and new Wonder Girls comeback.

Park Yeeun (who also goes by the name Yenny) posted a message in which she reminisced about her debut as HA:TFELT, the stage name she used for her solo promotions last year.

"Iron Girl HA:TFELT debut 1st anniversary! Time flew by so fast! #Theheroneverdie #illbeback Please look forward," Yeeun wrote, according to a translation from Koreaboo.

This led fans to speculate whether she was hinting at a nearing solo comeback.

"Omg! I wish you the best! I can't wait if it's your comeback as a solo! The way you express your music is perfect. Wonder Girls and your comeback, my life will be complete," said one particularly excited fan on Instagram.

HA:TFELT debuted as a solo singer on July 31, 2014 with the song "Ain't Nobody" which showcased her vocals and natural beauty.

Yeeun recently returned with a new album Reboot as part a four-member Wonder Girls lineup. The girls adopted a band concept for their title track "I Feel You" with Yeeun playing the keyboard. The music video attracted more than 2 million views on YouTube as Suzy Bae and their other label mates in JYP Entertainment promoted them.

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Mickey is a writer and digital content creator based in Manila. He is a co-founder of ZAVI App and editor of the small business blog IndieMickey. He has also been bitten by the K-pop fashion bug - follow him on Instagram @mickjami.