Sacrifice

S1 E1: When Captain Wataru Yuuki takes Big One into deep space to rescue a stranded space-train, he discovers two stowaways--his sons Manabu and Mamoru. Suddenly, the routine rescue mission turns into an all out war when an enemy Destroyer emerges from a White Hole. In order to combat the massive destroyer, Wataru has to resort to desperate measures. His sons and his crew can only watch as he makes the ultimate sacrifice.