"Ever since the appearance of superpower users, war has not stopped on Earth. Sentinel Han Tae-young and Guide Joo Se-in have been paired up in the military, keeping in sync for five years. Then one day, Tae-young suffers a runaway berserk episode, and Se-in finally realizes that Tae-young has been manipulating their pairing, shaving off five years of his own lifespan just to stay by his side."
"Ever since the appearance of superpower users, war has not stopped on Earth. Sentinel Han Tae-young and Guide Joo Se-in have been paired up in the military, keeping in sync for five years. Then one day, Tae-young suffers a runaway berserk episode, and Se-in finally realizes that Tae-young has been manipulating their pairing, shaving off five years of his own lifespan just to stay by his side."
thank you it makes sense now