MAMAMOO talked about why Whee In didn't join them for their Boracay trip.

On the October 8th episode of 'Knowing Brothers', the cast members grilled Whee In as to why she left RBW Entertainment to join Ravi's label GROOVL1N, and she shared, "Rather than being lonely, it's more like I'm curious what they're up to." 

The 'Knowing Brothers' then asked why Solar, Moon Byul, and Hwa Sa all went on a trip to Boracay together without Whee In. Whee In answered, "It's not that. I couldn't go because of a health issue." Solar and Hwa Sa then explained that the flights and plans were originally booked for all 4 members to go.

Check out the clip of MAMAMOO above!