Death Candle is a Manga/Manhwa/Manhua in english language, Shoujo series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Please, help me die! Sick of living, Mimi has tried numerous times to take her own life. Much to her dismay, she somehow always ends up surviving. But then she comes across a website called "Death Candle" and ends up signing a contract with a demon of death: if Mimi helps him collect souls, he'll help her die.