Stepping into Trouble by Go Un [Eng]

Stepping into Trouble Manhwa Plot: Eunsoo is not happy that his mother’s new boyfriend has sons—a pair of twins at that. What was his mother thinking leaving out that important bit of information?! And when his mother tells him she might just marry the man, Eunsoo is dead against it. But Eunsoo’s trouble ensues when the twins are more than determined to win their new ‘hyung’ over and lend him a helping hand to change his mind. Will Eunsoo give in and be bound to them in more-than-familial ties, or will he stay steadfast in his decision?