Guiding the Male Lead out of His Trauma

I transmigrated.I became a side character Guide who dies unable to withstand the power of the S-Class Transcendent male lead.The story goes that the male lead, traumatized by my death, overcomes it after meeting the heroine.For his growth and romance, I'm supposed to obediently become a sacrifice, but"Do you think I want to just die quietly?"What's more, my death also becomes the trigger for the villain here to develop a terrible hatred for the male lead.Why? Because I'm his older sister. Da** it.As the head of the family, there's no way I can die and leave behind my cunning but lovable younger brother.'So I decided.There's no reason this story absolutely has to have trauma.So first, I've got to survive. I started looking for a way to change my death."I can keep secrets very well. Why don't you test how obedient I can be to you, senior?""It's because it's you, seniornot anyone else.""I don't need any Guide but you. I want to be loyal only to you, senior."Just what's the problem here, in the middle of all this headache."Cadet Ortis, have you perhaps been hiding your rank?"S-Class.Even my rank has become strange.