Sachiko is the 17-year old daughter of radiotherapist Professor Oshima. After exposure to radiation in the hospital, she develops leukemia. As if that was not enough trouble for one lifetime, discovers that Oshima is not her real father, and that her boyfriend is really her half brother.

• Momoe Yamaguchi
• Tomokazu Miura
• Hiroyuki Nagato
• Chisako Hara
• Keiko Kishi
• Ken Utsui
• Kaoru Yachigusa
• Misako Watanabe