Ai's sometimes-rocky relationship with her boyfriend Sô has weathered many a storm and become stronger for it...but now that Sô's first serious girlfriend, Shuko, has come back into the picture, it may be a different story. Sô and Shuko have a history together, and Ai's confidence wavers when she realizes what a comparatively short time she has been a part of Sô's life. When Sô returns to the arms of his ex, will Ai put on a brave face and accept his decision, or will she push her hard-earned self-respect aside and beg to get him back? Find out in the poignant conclusion of DOUBT!!