The Bluewings missed out on a spot in last year's continental competition, but return to the fray this year after finishing as runners-up in the K-League Classic last season.
In their last AFC Champions League campaign the Korea Republic outfit lost all three of their group matches, crashing out at the first hurdle.
Seo's men begin their 2015 run with a clash against Urawa Reds of Japan on Wednesday, and will also come up against fellow Group G outfits Beijing Guoan from China and Australia's Brisbane Roar.
Speaking ahead of Wednesday's game, Seo said that his team were well prepared and ready for the task at hand.
“We failed in 2013 and we know how it tastes, so we've prepared a lot to not to repeat again,” he told the official AFC website.
“We all know that the very first match of the season is really difficult and important, but we will do our best and get a good result.
“I know we've analysed each other a lot. Both teams will show their passing and side game. I think the second half will be the decisive time for both of us.”