Isn't a Man at All

is chapter 22 of the Beelzebub manga.

Summary
Having splashed Takashima’s face with his 7-Up, Takayuki taunts him by asking if his head had cooled down. Takashima’s underlings become angered and try to beat him up, but Takashima stops them, claiming Takayuki had always had a habit of showing off in front of women. Takashima approaches Takayuki and reminds him of the painful experience he had from this habit. In a flashback some time ago by a beach, a bruised Takayuki is seen bowing down to Takashima in front of a girl. In the present, Takayuki proceeds to tickle Takashima, whom eventually loses grip with Takayuki. After losing grip, Takayuki headbutts Takashima in the face, causing him to fall back onto the table, tipping it over and spilling the yakisoba and soda on it. To their resentment, Takashima’s underlings demand to know why he’s trying to act so cool even though he’s supposed to be weak. With a glamorous face and feeling hurt from the headbutt, Takayuki declares that he’s extremely weak and runs off, to everyone’s shock. Takayuki jumps into the pool, escaping Takashima. Takashima commands his underlings to chase him, while Nene, with a smile, declares that Takayuki isn’t a man at all.

Takashima’s underlings are unable to find Takayuki. Disgruntled, Takashima calls the lifeguard, claiming a friend of his is drowning in the pool. The lifeguard is shocked and calls everyone out of the pool. Now underwater and unaware of what is happening at the surface of the pool, Takayuki plans on finding Tatsumi and leaving the pool. Seeing everyone’s legs disappearing, Takayuki notices he’s been singled out. Surfacing, he finds everyone out of the pool. The lifeguard realizes Takashima was lying, but it’s too late. Takashima and even more of his underlings are in the water with batons, surrounding Takayuki. Declaring to be leader of Nishi High, he declares taking revenge on Takayuki. Takayuki manages to find Tatsumi and Beelzebub still on a pool float next to him, albeit spaced out. Relieved to see them, Takayuki commands he beat up Takashima’s underlings. However, Tatsumi is dazed, speaking Okinawan to Takayuki and unaware of the danger around them. Meanwhile, Takashima plans on forcing Takayuki to bow down in the water, drowning him. Realizing he has only one option left, Takayuki begins to apologize to Takashima for what he is about to do. He tugs Tatsumi in the leg, sending Tatsumi and Beelzebub into the water. Now safely kneeling on top of Tatsumi’s plastic float, Takayuki waits for Beelzebub to cry. Suddenly, everyone in the pool, excluding Takayuki, becomes electrocuted by Beelzebub’s crying, to everyone’s surprise. Standing on top of the float, Takayuki makes an evil laugh and declares a Gigadean (a thunder spell from Dragon Quest). As the electrocution subsides, an annoyed Tatsumi is seen standing behind Takayuki, demanding to have a word with him.

Characters in order of appearance

 * 1) Nene Ōmori
 * 2) Takashima
 * 3) Chiaki Tanimura
 * 4) Takayuki Furuichi
 * 5) Tatsumi Oga
 * 6) Beelzebub