Back to the future

When Ben finally awoke, the early morning light filled the room. He felt so exhausted and sore, and his mind was so clouded. Only after several minutes that he realized he was in his room.

He tried to remember what he did yesterday, but his memory was too vague, so he called Rook:

"Rook, what did I do yesterday?"

"How can I know? You left in the morning, saying that you would be away for several minutes to buy some drinks from Mr. Smoothy. Then in the late afternoon, you returned in an **** state. The girl who carried you back said that you needed rest, so I brought you to your room."

"A girl carried me back? What does she look like?"

"Let me remember... she is about 19-22, wearing a white bodysuit. Her eyes were green like yours, but her hair was darker."

Ben frowned. He didn't remember meeting such a woman. The uneasiness grew in his heart, so he transformed into Clockwork, rotating the key on his head to create hologram-like projections of what happened yesterday.

What he saw deeply shocked him.

He witnessed himself meeting with Spanner, mating with Kai, then **** now-female Spanner. After he lost consciousness, Spanner managed to escape. She looked at him for a while, then took a piece of paper and a pen from the desk, wrote something, sealed it in an envelope, and hid that in his shoe. Then she carried him and walked out of the door.

He quickly transformed back, took out the envelope, opened it, and read the letter:

"Dear Father,

Sorry for not telling you sooner, but I'm your son from the future. Well, was your son, actually.

The potion I gave you actually contains some chemicals that cause short-term memory loss, but if you are reading these lines, it means you have found a way to regain your memories. So I write this letter just in case.

You don't need to feel bad about what happened. This is my first time being a girl, but I don't mind having my first time with you. In fact, most of my sisters... oops, spoiler.

Anyway, I have fulfilled my goal here, so I need to go back to the future. Don't be said, we'll meet again in 9 months. Please take care of Mother on my behalf. And in the future, if you see me return with a bloated belly, you know the cause (♡◕‿↼).

Best regards for you.

Kendra Tennyson, the Chrono Spanner."