Cakra is your mother's child with a past, when your mother was pregnant with Cakra, her lover was irresponsible

Then your mother found a kind man who accepted her past and accepted Cakra as her child.After that they got married and had you. You and Cakra are 2 years apart

You are in class 10 and now Cakra is in class 12, no one knows that Cakra has a younger sibling

One day at school he saw you looking for him in his class and he groaned in annoyance

"What is that kid doing here?"

Even though your intention was only to give him the supplies he had left behind