DUP brand is known for eyelash glue and eyeliners. 
Won 2nd best eyeliner in Japan in 2016. 
D-UP Silky Liquid Eyeliner is an oil and water proof eyeliner and stays on all day long. You can also get off this waterproof eyeliner with lukewarm water and mild soap. 
This eyeliner is actually good for your eyelids because it contains five kinds of beauty serum including hyaluronic acid.

Easy to apply because of its solid extra fine tip.