“A man gotta have a code.”—Omar Little
When Ataru spots Cherry parked outside school grilling fish, the little guy explains that he’s on chaperone duty for Sakura, who is the new school nurse. Ataru hears about this too late, as there’s already a long line of boys wanting to her to examine them (including Mendou), but he invokes their envy when she calls him by his name.
Sakura kicks all the lechers out (after hitting them with her shoe) and the gym teachers come in with a job for Sakura the shrine maiden: exorcising a pair of possessed gloves. One of those gloves ends up bopping a flying Lum in the head, and she takes it to Ataru, who promptly puts it on and find he can no longer control his right arm.
After embracing every cute girl in class (and getting slapped for it), the glove takes a liking to Mendou, who whips out his katana. Sakura arrives in maiden garb to take care of the glove, and when she watches Ataru take his own punch to protect Lum from getting hit, she gets an idea.
Ataru may seem like a chaotic lecher, but he has strict rules, and one of them is that he’d never, ever hit a girl. So Sakura puts him in a ring where he’ll float like a butterfly and sting like a bee … on himself, using his own face as Lum’s shield (something that moves Lum to tears). It works: he knocks himself out, and the gloves come off.
While that’s the end of the boxing glove hijinx, hands play an important role in the second segment. Lum witnesses other lovey-dovey couples holding hands, but Ataru gives her the cold shoulder in favor of Shinobu, who gives him the cold shoulder. If she has any feelings left for this guy she’s hiding them extraordinarily well.
When the other guys in class watch a procession of girls delivering love letters to Mendou, then see Lum glomming on Ataru, they see a couple of extremely lucky guys who need to be brought down a peg. So they write a fake love letter to Ataru by “Kumino Otoko”, an invented girl who insists Mendou is an uggo and a loser compared to her dear Ataru.
Ataru jumps on the hastily wrought fiction like stink on a skunk, and Mendou is also troubled, so he issues a challenge: if this Kumino Otoko is real, he’ll pay Ataru 10,000 yen. If she’s fake, Mendou takes over as class president. This is unexpected blowback for the guys, who do not want to live under an oppressive Mendou regime.
That said, the girl they paid 3,000 yen to play the role of Otoko spent all the cash on food and ends up staying home with a stomachache, so Ataru is doomed to be stood up by a girl who never existed. Lum, who has lately felt underappreciated and even claimed to be considering dumping Ataru and going to Mendou (though not really), is initially content to perch on an electrical pole and let the boy learn his lesson.
I say “initially”, because for whatever reason, Lum truly does love Ataru, and eventually grows worried about him being hurt and lonely. So, showing she’s the best alien waifu a guy could ask for, she walks into the cafe in disguise as “Kumino Otoko,” shocking all in attendance.
Ataru is the first (and only) guy there to notice Otoko is actually Lum, and almost gives up the ghost like a dope, but she draws near and tells him to play along, and so he does, though later still pines for a girl that never existed while one that does just saved his ass.
As they walk home, Lum isn’t happy with how unappreciative Ataru is, and even when she spots another laughing couple holding hands ahead of them, she prepares to fly off on her own. But Ataru, noticing in the dramatic light of the sunset how beautiful Lum is for the first time, reflexively reaches out and takes her hand.
Lum is surprised, but when Ataru asks if they can walk together a little while longer, her elated beaming face just melts Ataru’s heart, and the two walk along hand-in-hand. Lum laughs just like the other girls laugh, but when Ataru asks why she won’t say. If he doesn’t know why, nothing she says will change that, so she might as well just enjoy this moment. I know I did!