Our Wedding(俺っちのウエディング)

On her wedding day, Makiko is stabbed by a woman in wedding dress. The wound isn't serious but the attacker blows herself up and can't be identified. The attacker is thought to be an ex-girlfriend of Tsutomu, the groom. He gives two names to the police but these two are still alive. But there is still one woman in Tsutomu's mind...