Yuko passes through her free sex period and marries Yusaku Aisaka for a limited time. During that time, Yuko had intended to have more sex to her heart's content, but she was unable to satisfy Yusaku's limit of energy.
2000
1981
2001
1988
1994
1989
2006
1980
2003
1987
2007
2008
1999
1952
1979
2005
1990
