The episode starts off with Haruma prepping for his date with Ayano-san. Choco also gets ready, but Haruma says he cannot bring her. As Haruma steps out the door, he sees Makoto dashing off yelling, 'I'm late, I'm late!'

Late for what?
Meanwhile, Choco is feeling considerably down, since Haruma did not take her along.

Lover  S ~
Switch scenes back to Makoto, who's in a taxi that's stuck in traffic. She's apparently going to be very 'late for work'. (Oh, I see. Haruma's date and her 'being late for work' seems just a bit too coincidental.)
At the preview, the announcer asks top model Arisa Otokami-san to present the movie staff with bouquets. (Arisa, Ashirai…) Well, as Arisa catches a glimpse of Haruma, she winks in his direction.

Obvious plot development is obvious.
Meanwhile, Choco is sitting along at the park when Kakeru-kun comes along. He asks what's wrong, and she tells her. As he explains to her that it's normal and Haruma is just on a date, she begins to cry. Kakeru-kun becomes nervous and calls Haruma an 'awful big brother', but Choco snaps at him to never talk about Haruma that way. (Sorry Kakeru! You can't win on this one.)
At the supermarket, Chitose exhibits her consumerism.
After the movie, Haruma asks Ayano-san if she'd like to go eat. She agrees, to his delight. Chitose catches a glimpse of them as they pass her, and she is crestfallen to find Haruma with a woman. She tails them, spying on them from a restaurant across the street.
It's a small world after all. In the booth next to Chitose's, Ayano-san's ex-fiancee is talking to his former employer. He needs to leave the city to take care of a countryside inn, since his father passed away. The employer tries to (unsuccessfully) convince him to keep the job.
On coincidence, Haruma, Ayano-san, her ex-fiancee, and Chitose all leave their respective places at the same time. As such, they all end up face-to-face with each other.

Forecast calls for impending SHITSTORM
Upon seeing her ex-fiancee, Ayano-san grabs onto Haruma's arm and leads him away. After a pause, ex-fiancee and employer walk away, leaving Chitose dumbstruck. At that moment, Makoto shows up; her usual bright, cheery, and freeloader self. Chitose grabs Makoto and begins to cry.
The next morning, Haruma gets a sub-par breakfast from Choco, since she's still angry with him. Next few scenes show 3 different girls - Choco, Ayano, and Chitose - being moody.
At school, Tamami-senpai shows up. As we've learned thus far, Tamami-senpai = job offer, so I don't think I need to explain. Since Haruma's date with Ayano drained his coffers, he reluctantly accepts. Haruma calls home to let Choco know he'll return late.
Choco goes to the park to sulk, where Chitose finds her. They both decide to go eat at Chitose's place. (It seems like Choco finds Chitose to be a very motherly figure, so I'm thinking Haruma will probably end up hooking up with her.) Anyway, Choco and Chitose have a good time, eating and watching TV. It doesn't last, though, since Choco begins feeling down again. She wonders if Haruma's stopped caring about her. (Reasons cited are not taking her out as much and promising to give her a present but forgetting.)
Choco is leaving when Haruma returns.

He gives her a present to make up for the one he forgot about. (Good ol' Haruma) Chitose also gets one too, since she's always watching out for Choco. Welllllll everyone's happy again. All's well that ends well, right?