Maria got angry on the church because of Yozora and Kobato ("Who is it again... Ley...sushi? Ah yes, sushi! Poop sushi!"), just like usual. She went hysterical again when she saw Kate drank cola for herself and she called Kate poop grandma so Kate punished her.
On the club room, Maria went for Kodaka to be spoiled by him. Yozora and Sena whom saw Kodaka happily stroking Maria's head called police and Pegasus to arrest and expelled him, respectively
Rika, to made things fun (for herself), said to Maria that Kodaka will hate Maria if she said poop over and over like she usually did, so to make Kodaka likes her even more Rika said to Maria that she needs to learn to be a fine lady from Yozora, Sena, and Rika. As for Yozora and Sena they became motivated to teach Maria so Kodaka could see them as a fine lady themselves.
First lesson is from Yozora. She said for Maria to became a fine lady she needed to change her 'poop' line. Yozora asked her to changed it to 'riajuu' and so Maria called Yozora "Riajuu-Yozora", that made Yozora went........ to the other world XD
Sena: "I guess I'll be more kind to Yozora from now on"
The second lesson is from Sena (she almost went crazy like Yozora when Maria called her "Riajuu-Sena" too, lol). What Sena taught him was what she did to the boys from her class, that she said make them happily cried.
S-Maria, born...
The last lesson which was from Rika, Rika taught Maria to cosplay as a cat girl, Marianyan. Kodaka tried so hard not to stroke her belly like what she asked, but Marianyan strike him with the killer line, "Onii-chan, daisukinyan yo". But it made Kodaka ran out from the club room, crying that it was not Maria he knew.
Later on the church Maria asked Kate why Kodaka didn't like her more even though she tried many things like what the girls said. Kate just drank her cola and didn't answer so it made Maria angry and said she'll figure it out herself. Kate was smiling, seeing Maria tried so hard to make someone to like her, as it was very rare for her. Maria then came to a conclusion that Kodaka will like both when she was her usual self who said "poop" all the time and when she became a lady after what happened on the club room, so she has made her decision. The next day when Kodaka came to the club room, Maria asked her, like a housewife, "Welcome back onii-chan. Would you like to eat potato chip, take a bath first, or.......... p-o-o-p♥?"
That was Maria's decision, she decided to become a poop lady. But to Yozora, Sena, and Rika surprise, Kodaka was really happy with her decision.
"That's it. It's not Maria if it's not poop"