Sena, one of the most popular girls at school, is looked up to for her beauty, style, athleticism, and academics. She is also a member of the Neighbor’s Club. She is seeking a sincere connection, the kind of friendship where she doesn’t have to wear a mask to hide her awful personality. The club decided that dating sims would be a great way to simulate real-life interactions and use them as practice for real life. The scene worth mentioning on this list is when Yozora, who loves to bully Sena, and Kodaka catch her playing an eroge (porn) dating sim in the club room. Sena argues that she’s just playing it for the story and it should be considered high art. Yozora claims she’s just a deviant and if it was “high art” she should be able to read one of the scenes out loud. Sena doesn’t back down, despite truly wishing there was a way to get out of it. “Lucas, quickly cleave my naughty varniable* with your big gleaming black…” well you get the point. The hesitant reading along with Yozora and Kodaka just watching the ever-embarrassing erotic verbal game of chicken puts this scene on our list.

The previous episode had the club attend the summer festival filled with yukatas, games, and fireworks. A small incident with Yozora and some fireworks has the ends of her hair catch on fire. Kodaka grabbed the closest water supply he could and doused it. The problem is it was the water bucket they’d been, like responsible people, placing their old fireworks in. He notices at the first day back to class that Yozora’s hair, once waist-long, was now cut short. Kodaka approaches her after class is dismissed and asks her why she cut her hair. Everyone in class is listening in on the conversation since the loner Yozora and the delinquent Kodaka are talking. The two club members recap the night the tips of her car caught fire saying things like “You doused my whole head. No matter how many times I washed it I couldn’t get the weird smell [sulfur] out of my hair.” The class heard “You doused my whole head,” and “He says just the tip. But he forced her?!” and “She resisted. She washed and washed and couldn’t get the weird stink of the white fluid out.” We like this as an ecchi moment because it’s how dirty rumors start. It’s like a game of telephone where what starts as innocent grows and grows, sometimes to hilarious ends.

We’ve all at one time or another been introduced to our parents’ friends. Sometimes in spite of the fact that they’re complete strangers, they feel a connection with us because of their friendship with our parents. A family connection like that can help from time to time, in Kodaka and his little sister Kabato’s case the President of the St. Chronica Board of Directors was a friend of their father and expedited their entrance to the school. Kodaka finds he has a second connection with the President as Neighbor’s Club member Sena is his daughter. Kabato and Kodaka are invited to have dinner with Sena and her father. It’s a long, full-course dinner that keeps the siblings at the home late into the evening and long after the buses stop running. Sena, as we know, is a weird one and goes to enjoy an evening bath with Kabato. We don’t know what happens in the bath between the older girl and younger girl but it ends with Kabato fleeing through the hallway naked until she runs into her brother and hides behind him. Kabato begins to explain what happened when Sena shows up running down the hallway, completely naked. Kodaka gets an unabated look at his naked classmate and we, the viewers, get a slow-motion view of a naked, running Sena. Her facial reactions as she realizes the eyeful she’s giving Kodaka, are priceless. The scene is short but funny, as the always socially awkward Sena is discovered streaking through the hallway.

Rika is a genius. Rika attends Saint Chronica Academy but doesn’t attend class. Rika spends all her time in the lab inventing things. Rika speaks in the third person. Rika, most importantly, has no friends. A chance run-in with Kodaka brings Rika to the Neighbor’s Club (being a genius she easily figured out the code on the flyer). The freshman is also a little obsessed with Kodaka. While fawning and clinging to Kodaka, it’s noticed that she has a book in her pocket which she proudly exclaims “Rika forgot there was a dirty book in her pocket.” The members of the club are shocked at her unabashed attitude about it. She shows how on the surface it just looks like a robot manga but when you read it, it’s a little more than that. Rika then gives the audience a dramatic reading, “How do you like the taste of my prized high-mega bazooka, Unit No. 2?!” and “Oh, ZZ it’s so fat and hard.” She continues for quite some time, getting more and more excited herself. The scene ends with Rika turning to Kodaka and asking quetion “Senpai? How about trying sexual intercourse with Rika?” Kodaka never quite gets the chance to respond before the others in the room lose their minds at the indecency of it all. Rika’s lack of modesty is simply one of the reasons she’s one of the best characters in the show and the reason this ecchi scene makes our list.

The club decides having a summer camp at the beach will be good practice when they find friends and participate in “normal” human relationships. We all know that beach episodes are ripe with potential for ecchi moments and Haganai is no different. The ecchi moment that stands out is a suntan lotion scene with a twist. Kodaka, being a good older brother, won’t let Kabato go out in the sun without putting on suntan lotion. We now introduce you to Yukimura, a member of the club, and an effeminate young man who idolizes Kodaka for being a manly man. He’s pledged himself to Kodaka’s service as if Kodaka was a shogun or yakuza lord. Yukimura has also been convinced that only by projecting his manliness while wearing women’s clothes will he achieve his goals of masculinity. We now get back to our scene; Kodaka is putting on Kabato’s lotion and Yukimura offers to do the same for Kodaka. It is all innocent enough except in Rika’s mind. Yes, Rika, who shares a homoerotic fantasy of a naked Yukimura and Kodaka lathering each other up in oil. The visual is nice and Rika’s commentary is absolutely funny all the way until she passes out from over excitement giving us a greatest ecchi moment of Haganai.