Soul Eater, Vol. 4

At Maka's request, she and Soul meet with Doctor Stein for an intensive
tutoring session. Although Stein warns that they may never be able to
resonate again if they fail to complete the training, Maka insists,
desperate to become stronger so that Soul is never hurt again. But
Soul's strange nightmares have made him reluctant to seek power, and his
unwillingness to share his fears only frustrates his partner. With
their soul wavelengths pulling apart, will Maka and Soul be able to come
together when danger emerges on their next assignment?