Stealing the Bastard's Girlfriend

Eunnah Louisse Samson is truly,deeply inlove with her boyfriend named Eric Kristoffer Manalili.She loves him to the point that she can't live without him. Ang hindi niya alam,na ang boyfriend niya is the illegitimate son o bastardo na dahilan nang pag-aaway nang parents niya.Sa madaling salita eh half brother niya ang boyfriend niya,pero Eric knew it from the beginning na magkapatid sila.He has a plan na gumanti kay Eunnah at sa family niya dahil mas pinili nang tatay nila sina Eunnah at ang Mommy niya.Ang here comes Matthew Louisse Reyes na classmate ni Eunnah na hate na hate niya.And the time comes,Matthew decided to steal the bastard's girlfriend. Will Eric's plan be succesful?or Will Matthew can steal the heart of Eunnah?In the end,how Eunnah will accept everything?