Tina isn't feeling well and has a bad cold. Mac accompanies her to the doctor, but they have to wait until it's Tina's turn.

Tina has known Mac for as long as she can remember, and Mac is always there for her.
He has to be, because his most important job is to look after Tina without influencing her own development.
This is no easy task for a bodyguard who is not accepted by everyone without reservation.

Now that Tina is a little older, she appreciates Mac's friendship and the two have become good friends.
Tina is also sometimes teased because she has a “tin man" for a friend. But she doesn't mind, because she knows that Mac is always there for her and always will be, and that he would never lie, cheat, or betray her. As she has experienced with other so-called friends.

But a thought crosses Mac's mind, even though he is only a “machine". Tina is growing up and will live her own life.

What then?

Then Mac will have fulfilled his purpose and will probably no longer be needed.

Will they remain friends even then?
Will Mac be reprogrammed?
Will he be given a new task?

He doesn't like these thoughts at all.

It's not time yet, and he wants to enjoy his friendship with Tina for as long as possible.

Neither of them knows how it will end.