Teppei an Ritsuko worked together and earned money by blackmailing (Teppei) and marrying ( Ritsuko) rich guys. They targeted Rena's father but Rena overheard them talking in a restaurant and took action by confronting Ritsuko. Ritsuko wasn't too pleased about this and tried to kill Rena, but failed and ended up dead instead. So the only solution for Rena was to kill Teppei. Because both Ritsuko and Teppei are strangers in Hinamizawa, no one would miss them and/or search for them.
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teppei has no ex-girlfriend
Teppei Koike is 167 cm.
Teppei Koike is 31 years old (born Koike Teppei, January 5, 1986).
Teppei Koike was born on January 5, 1986.
Teppei Koike was born on January 5, 1986.
Teppei Nishiyama was born on 1975-02-22.
Teppei Isaka was born on 1974-10-23.
Teppei Tomioka was born on 1977-03-01.
Teppei Teranishi was born on 1980-09-13.
Teppei Takano was born on 1983-11-25.
Teppei Uchida was born on 1975-05-22.