This use of 微妙 translates better to 'uncanny' rather than 'subtle'
追記: あれ？もう既に上手いぞ？？？？？
I feel called out at , I literally draw hair lke that, every time TTThank you for the lesson teacher Saito :)
You should pay great attention to .What Saito Naoki is doing is a great way to identify where your line isn't connecting when you want to use the fill tool, you draw some separating line, so that you can eliminate parts that get filled well, and it's easier to find where the tiny gap is hiding since you only have a portion of your original lines to check.
