You won't believe it but it's a salted watermelon flavor
It's kind of salty watermelon if that's believable
You won't believe it ( 信じられないかもしれない)but it's a salted watermelon flavor( 味が塩すいか)
It's kind of salty watermelon( なんか 用 塩すいか) if that's believable( それを信じるなら)