You all can read this legally at Lezhin with 3 coins per chapter. Lezhin is doing daily bonus recently, so you can get one coin for one days and 30 points (Points can be used to redeem and buy coin on discount) So like after 6 days you already can buy one chapter. Other than that if you use app you can play some games to get the coins.
Painter of the Night(Yahwacheop)