Choukou Tenshi Escalayer -Beat Angel Escalayer-

A visual novel/RPG game from Alice Soft.

Beat Angel Escalayer (超昂天使エスカレイヤー Chōkō Tenshi Esukareiyā) is an eroge series created by Alice Soft, and a hentai anime OVA animated by Pink Pineapple in 2002.

Sayuka Kōenji (高円寺 沙由香 Kōenji Sayuka)

The main protagonist. She commands the ability to transform into a super powered being known as “Escalayer” upon “charging” the Doki Doki Dynamo through sexual activity. As the story develops she is seen to grow feelings toward Kyōhei, eventually professing her love to him. Her main weapon is a shape-shifting energy whip.

Kyōhei Yanase (柳瀬 恭平 Yanase Kyōhei)

The school playboy and Sayuka’s childhood friend. Kyōhei is blackmailed into helping Sayuka after he is discovered eavesdropping on an unsuccessful charging session. While at first their relationship was strictly used for the aim of charging the Dynamo, Kyōhei rediscovers the feelings he once held for her. Acknowledging these feelings, he proceeds to profess them to her.

Madoka Kōenji (高円寺 マドカ Kōenji Madoka)

Sayuka’s gynoid companion. Self-sacrificing and no-nonsense, she often has to ground Sayuka and Kyōhei back in reality with the importance of their mission. She initially considers Kyōhei a simple tool, insulting his inability to stimulate Sayuka as time progresses. She later develops a deeper relationship with him towards the end, however. Her main weapon is a gun attached to her right arm.