[All] News about Haechan and Mark's first solo album featuring

There is news that Haechan will be featured in Mark's first solo full-length album, which will be released on April 7th.
It has been said that the song featuring Haechan will be released as a pre-release song on the 19th!
According to the story that Haechan told during the live, Mark said from the beginning that he wanted to be with Haechan!
Haechan said he did what Mark told him to do this time, so I'm really curious about how it is ㅎㅎ

I wish the 19th would come quickly 🙏