My Seven Senior Sister Spoiled Me a Lot is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

When he was 18 years old, Chu Fan killed the leader of the demon clan and left the sealed village, only to be rejected by the Bai family for marriage. Several senior sisters who heard about this hoped to bring Chu Fan to their own homes. Thinking he could enjoy a life of ease, Chu Fan soon discovered that the demon clan leader, the demon race, the Heaven palace, the mysterious door in the void, and the scattered bodies of divine spirits all seemed to convey one message – this world was not as simple as it seemed.