You Are My Heartbeat

Sira is a hardworking businessman who really hates dirt and lies but has to deal with Keetika, a tricky designer who doesn't have a very good relationship with her mother, Parin, because she left her father for Papop, an owner of a large garment-textile company. That makes Keetika have constant run-ins with Chanaratee, who is Papop's daughter.
Sira was adopted by Premyuda when he was a child. He works really hard to get Sasa, a real trouble maker, back on track for Premyuda. He then asks Keetika, who Sasa used to have feelings for, to work together just to make Sasa come to the company without knowing that Premyuda is the reason behind the end of their friendship. In the end, Sira and Keetika start to have feelings for each other.
(Source: IQIYI)