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- Region：Japan
- Type：OVA
- English name：Dousou Kai / Yesterday Once More
- Official name：同窓会 Yesterday Once More
- Chinese name：同窗会
- Other names：Dousou Kai: Yesterday Once More / Class Reunion同窓会 Yesterday Once More
- Premiered：December 19, 1997
- Status：Finished Airing
- Tags：Harem / R(x) / Source Gal
- Original author：フェアリーテール
- Director：ふくもとかん
- Scenario：高橋美幸
- Storyboard：ふくもとかん
- Character design：水谷とおる / 高木信一郎
- Music：松下一也 / ケイエスエス / 飯塚康一 / 髙桑一 / 糸川幸良
- Studios：ARMS
- Producers：ピンクパイナップル
- Family：Yesterday Once More
- Rating：18+
Dousou Kai
A young group of friends meet up for the first time in a very long time after finishing high-school.
One of them remembers how once ago a girl left him Daisies and a love letter inside his locker, back in the high-school days.
He has three suspects of who this secret lover could be and so there is only one way to know... by having sex with all of them.
