Please help me how to get an korean visa?

im ma filipina and want to travel in korea and after that travel to korea i will go to bangkok,,, please help me how can i have korean visa? i dont have a job as of now my bf will shoulder all the expenses for my vacation and i also dont have a bank account... what can i do? but i can buy all the ticket from manila to seoul then seoul to bangkok then after back to manila..... i only want to stay one week in the said country