Paying Life Debts (BL)

A road accident that cause by her suddenly took her life on that peaceful night after she broke up with her boyfriend that evening. Autumn woke up in a weird place as it was all white surrounding her. Right then a cute childish word spoke up.
"Good day, host! Nice to meet you! I'm system number 911 at your service."
...
"Host, did you know that your accident have killed 9 people on spot and make dying with you?"
....
"Now you have to pay your debt to them for ruining their lives. As you have made 9 people dying, you will be sent to 9 difference world too make it up for them and live their life to maximum happiness and peaceful life that they could ever wish for. If they have any regrets or any wishes, you must complete it without failure."

However, she never thought that she had to lived as a man in every world. At first she had a difficult to adapt but afterward she found that lived as a man is easier than woman because she did not need to worry about that every month. Plus she could look at every handsome man as she pleased without worry that they would misunderstood her like when she was a woman.

Author's Note:
The image is not mine. I'm an amateur write so please don't mind me. This story is inspired by Quickly wear the face of the devil, King's game, Who touched my tail, Lovers always on the counterattack, It's not easy wanting to be supporting male lead and etc.
This is BL story as our female protagonist will be male protagonist in the whole story plot. So do not confused when you read the first chapter that describe as 'she'. From the arc 1 onward, the protagonist will be male and describe as 'he', no longer 'she'.