Mahiro and the Strategy Meeting

Mahiro and the Strategy Meeting (まひろと作戦会議, Mahiro To Sakusen Kaigi) is Chapter 56 of Onimai: I'm Now Your Sister!. It was originally published on Pixiv on September 25, 2021.

Summary
Mahiro and her friends get together to decide on something fun to do during summer vacation.

Plot
At the Hozuki residence, Momiji announces that it's almost summer vacation. She wants to know what they should do and where they should go. Mahiro pulls Momiji down, saying that she's going a little overboard. Momiji points out that it starts next week, and insists on making plans now. Asahi is equally excited as they have more people this year in the form of Nayuta and Mahiro. Mahiro doesn't include herself in the mix until Miyo reminds her that this truly is their first summer vacation as friends.

Momiji asks for ideas, and Asahi volunteers to go first. Asahi says that summer means summer festivals, imagining herself being flung up by the crowd at one. Momiji realizes that Asahi really doesn't know what that means, while Mahiro thinks that it would be too hot for that.

Miyo suggests that they could go to a fireworks show, as they are held in the evening when it's cooler. Mahiro is more on board with that, but notes that it'll still be crowded.

Momiji decides that with that out of the way, it is now a choice between camping or the beach, which Mahiro is on board with. Miyo asks what everyone prefers, and Asahi suggests that they take a vote.

Momiji and Asahi vote for the beach. Momiji says that she'd much rather go camping in the fall, and Asahi suggests that they could catch fish.

Miyo and Nayuta vote for camping. Miyo doesn't want to wear a bathing suit, while Nayuta remarks that she'd love to go spelunking.

Asahi notes that the score is tied at two against two, and Momiji tells Mahiro that the deciding vote is hers. Mahiro is shocked and doesn't know what to vote for, as she would much rather prefer to stay at home.

Just then, Kaede returns home and announces it. Asahi greets her, and Kaede in return says hi to everyone. She sits on the couch and begins to pull the front of her top noting that its hot outside. Momiji tells Kaede not to be unladylike, but Kaede asks why not as this is her house. Kaede asks if it makes you want to dump a bucket of water on your head.

Seeing Kaede's bust and hearing that statement causes Mahiro to cast her vote for the beach, much to Asahi's joy. Mahiro apologizes to Miyo, but Miyo tells her not to worry about it. Miyo then asks Kaede for her advice on something.

Later at the mall, it is revealed that Miyo asked Kaede for advice on swimsuits. Kaede had taken Miyo to the mall to get a new one, with Mahiro, Momiji, Asahi, and Nayuta tagging along. Kaede tells Miyo that she has a nice body, and that she's in good hands with her. Nayuta asks if there's something wrong with wearing a school swimsuit, with Mahiro explaining that there's a certain brand of freak. Momiji is surprised that Nayuta doesn't have a normal swimsuit. Hearing this, Kaede suggests that they all get new swimsuits, much to Asahi's shock. Asahi is pushed into the store despite her protests. She insists that she'll just wear trunks, thinking it'll be fine. Kaede says that it won't and pushes Asahi inside despite Asahi's attempts to get out of it.

For Asahi, Kaede picks out a light two piece bikini with a ruffled top. She says that for a slender gal like Asahi, a ruffle top will hint at a fuller figure. She adds that filling out the chest really helps her appeal. Mahiro and Miyo think that Asahi looks so cute in it, but Asahi thinks that it is embarrassing.

For Nayuta, Kaede picks out a dark two piece string bikini with a tube top. She says that a tube top will push things into place and to give her a hot look. Nayuta is amazed at how developed she looks, while Momiji gets jealous at it.

For Miyo, Kaede picks out a dark halter neck compression top with a tropical pareo. She says that since Miyo prefers the other way around, a halter neck compression top will hide her cleavage and minimize her assets. The cute pareo down below will also draw the eyes downward for an overall nice mature look. Miyo is amazed and says that she is so glad that she asked Kaede for her advice, to which Kaede says that it was no problem.

Kaede tells Miyo that she knows how she feels, as she also started to hit her stride in junior high too, much to Miyo's surprise. She explains that at first it was embarrassing for her too, but she realized that there was no use moping about it. Therefore, she turned it to her advantage instead. She tells Miyo that she should have more confidence in herself, and Miyo is amazed that she has someone who can relate to her so well. Kaede asks Miyo if she wants to be a little more daring, and Miyo seriously considers it.

Mahiro notes that Kaede acts to Miyo just like a real older sister would, but Momiji gets the feeling that Mahiro is judging her. Mahiro thinks about swimsuits, and remembers how Kaede forced her to buy one before as well, noting that time sure has flown by.

Kaede says that all that's left is Mahiro, much to Mahiro's shock. Mahiro insists that her swimsuit from last year is fine, but Kaede tells Mahiro not to dare try and pull one over on her. She gropes Mahiro's bust from behind, pointing out how much Mahiro has grown since then, much to Mahiro's shock. Kaede drags Mahiro to the fitting room saying that she needs a new swimsuit to match. All the while, Mahiro yels for Momiji to save her. Asahi notes that Kaede really is touchy-feely, which caused Momiji to laugh.

When all is set and done, Mahiro asks Miyo what she ended up buying, as she was undecided for awhile. Miyo tells her that it is a secret for now. Momiji begs Kaede to let her pick out one too, but Kaede insists that Momiji's suit from last year still looks great. Miyo comments that it must be nice to have such a reliable older sister. She mentions how she is an only child, so she can't help but admire her. This gets Mahiro thinking about her own sister.

Mahiro announces herself as returns home. Mihari welcomes her back and says that dinner is almost ready. As the two eat dinner, Mahiro tells Mihari how they were thinking about going to the beach over summer break and asks Mihari if she would like to come with them. Mihari is shocked, then notes that she's better go on a diet starting tomorrow. Mahiro is surprised, thinking how its not fair to be measured against Kaede.

Later in the bathroom, Mihari is shown in her swimsuit checking to see how much weight she needs to lose.

Characters

 * Mahiro Oyama
 * Mihari Oyama
 * Kaede Hozuki
 * Momiji Hozuki
 * Asahi Ōka
 * Miyo Murosaki
 * Nayuta Tenkawa

Trivia

 * Mahiro references when Kaede forced her to try on and buy a swimsuit in "Mahiro and the Girls' Day Out".