I forget the title of novel I want to read. Maybe one of you may know. It may be mtl novel.I am not very sure. I think(Maybe) MC is tasker with system. In ABO world, MC transmigrated into omega who was spoiled by his father and brother.His father and brother spoiled him beacuse he had no mother.I think his mother died when he is born. His family is one of the major family.His father is former marshal(i think).His brother is also colonel or maybe general.His brother is attacked by zarg and become disabled.His brother is under investigation because someone framed him.He have fiance.He is ML.He treats his fiance badly.Actually his fiance is his father's friend'son. BUT HIS parent died when he is young. He is orphan.The original owner treat him badly because he is arrogant and think ML don't deserve him.Actually the original owner is just cannon folder.ML is reborn.In his previous life,ML went to recuse when orginal owner is kidnapped.When he arrived,original owner's glands are destroyed.The original owner framed him that his brother is disabled beacause of ML and said the master mind of kidnapping case is also ML.Beacause of that ML was put in jail. And there he become boss in prision and got S class mecha.When he breaks out of prision , he wanted to revenge the original owner but he only got the news that the original owner died two years ago.And then he reborn with his S class mecha and meet MC who is transmigrated into original owner.He come to MC's house to bring MC to meet his brother who is injured.I remember MC bring pink robot cat .And ML 's Sclass mecha Love it so much beacause it is pink colour.His mecha love pink Lmao.And there is one thing Ml don't know.That is in his previous life,the one who framed him is not the original owner.After being kidnapped,the original owner destroyed his gland not to be raped by kidnapper.Then kidnapper killed him.He is already died before Ml arrived.The one ML make is fake.He also pretend to be lover with another man in front of ML. In hisworld,there is a tasker with system who is a star thief.His mission goal is to blackened Ml(I think).So ,he make a fake one exactly like original owner to framed Ml and feel him the betrayl of his fiance.When Ml meet MC,he want to revenge him but because he is bored he played with MC.He also bring MC to battlefield to find the proof that MC's brother is innocence.MC also meet his brother's lover.His bro's lover has proof.In there the star theif also come and fight.MC is injured and he pretend to memory loss.His brother'lover is also omega pretending to be beta.Later ML started to love MC.He also prepare to marry MC.He even tried to force mark MC but then he let go.Then i think they quarreled and MC fall down from stairs. MC pretend to regain memory.later ML has to go to catch star thief.He know from the star thief about the truth of last life.He killed the star thief.Then apologize MC and marry(I think) IF ANYONE KNOW,PLEASE TELL ME THE TITTLE.
Sounds familiar, not sure if it's this: https://www.novelupdates.com/series/i-really-am-a-slag-shou/ the interstellar arc starts from ch 30