Name: CEO (I dunno, I don't think she's ever named, everyone just calls her CEO)
Effect: Drain?
https://mega.co.nz/#!YM5BAJTK!vnE1M3edDi9a-YDY4frMvy_kd3Y5hi2yLTTZx1_5lPk
(NSFW, I guess? It has naked bodies but it's not really Hentai...)
Eiken (a.k.a that ecchi franchise where everyone has super giant boobs) manga version is actually a lot better than the Anime version but unfortunately it was never fully translated, stopping at like chapter 14.
This part is from Chapter 18 so it's in Japanese, sadly. I can't really read Japanese that much, but from what I can see from this chapter, there's a new villainess CEO who's trying to steal away the main character's girlfriend to make her into a fashion idol or something and so she seduces the main character to make her jealous. When she kisses the main character, I think I can recognize the kanji for "drain" and "my body's power is fading away" so I assume that's what's happening.
I uploaded the relevant couple of pages or so, go to page 52 if you want to jump in straight away. If anyone wants the rest of the chapter I can upload it too but sadly I don't think any more kisses happen.