What Do You Mean I Was Reincarnated into a Tentacle Monster?

The seventeen-year-old dead house Xu Lingling died. Then he was reincarnated into his favorite game, using his favorite character. But his favorite is the tentacle monster. Just when he felt that life was hopeless, he met a lonely female knight, a magical girl who lacked blue, and a young lady who lacked common sense... It doesn't seem that bad? (PS: Time travel, transformation, the protagonist is non-human, it may cure, it may cause depression)