因为父亲的再婚，十六岁的女高中生朝日奈绘麻（佐藤利奈 配音）入住朝日奈家，她一下子多了十三个新兄弟！父亲和新的母亲住在别处，而绘麻和十三个兄弟生活在同一屋檐下。新生活第一天，迎接绘麻到来的是温柔的长男雅臣和年幼的末子弥。随后绘麻一一见过她的新兄弟，包括同卵双胞胎椿（铃村健一 配音）和梓（鸟海浩辅 配音），而且她还发现同班同学朝日奈侑介（细谷佳正 配音）也成为了自己的兄弟。侑介对于绘麻的到来感到十分吃惊，他似乎对绘麻怀着不一般的情愫。十三个兄弟职业不同，性格各异，绘麻的到来，是否会对他们造成困扰？迎来二十岁生日的昂（小野大辅 配音），酒后竟然说出了心里话…… 　　期待有朝一日可以被接纳的绘麻，会与十三个兄弟产生什么样的羁绊？

「BROTHERS CONFLICT」是连载于月刊杂志「SYLPH」上的小说，由叶濑敦子企划并负责原案、水野隆志撰写脚本、Udajyo绘制插画。故事主要讲述了由于父亲的再婚，就读高中的女主人公不仅拥有了很多兄弟，而且还与性格各异、职业五花八门的他们同住一个屋檐下。与兄弟们加深羁绊的同时，还开始培养“禁断”之恋。此外，本作还推出过角色CD和广播剧CD，并由打造了不少人气乙女游戏的Otomate制作成全两作的PSP游戏。 根据本作改编的TV动画确定将于今年夏季开始播放，由打造了「夏目友人帐」、「无头骑士异闻录」、「回转企鹅罐」等作的Brain's Base负责制作。监督是曾执导「女神异闻录3」、「闪光的夜袭」的松本淳。系列构成由在「钢铁三国志」、「07-GHOST」、「豆芽小文」等作中担任同职的高桥奈津子负责。角色设定是「我们没有翅膀」、「蔷薇少女」、「香格里拉」的人设担当者石井久美。 声优方面，动画版完全沿用了原作的豪华阵容。

バレンタインデーが间近に迫ったある日のこと。帰宅した絵麻の手には、きれいにラッピングされた小箱があった。それが「谁かに赠られるチョコレート」だと察し、浮き足立つ兄弟たち。そんななか、弥が「仆は逆チョコをあげる！」と兄たちの前で宣言して!?

会いたいときに会えるけど、愛を囁き合うには近すぎる ―― それがわたしたち、キョーダイ。 　　禁断のキョーダイ的 “ 恋愛衝突 ( ラブコンフリクト ) ” ついにOVA化 ! ! 　　≪ストーリー≫ 　　バレンタインデーが間近に迫ったある日のこと。 　　帰宅した絵麻の手には、きれいにラッピングされた小箱があった。 　　それが 「誰かに贈られるチョコレート」 だと察し、浮き足立つ兄弟たち。 　　そんななか、弥が 「僕は逆チョコをあげる !」 と兄たちの前で宣言して ! ?

バレンタインデーが间近に迫ったある日のこと。帰宅した絵麻の手には、きれいにラッピングされた小箱があった。それが「谁かに赠られるチョコレート」だと察し、浮き足立つ兄弟たち。そんななか、弥が「仆は逆チョコをあげる！」と兄たちの前で宣言して!?

会いたいときに会えるけど、愛を囁き合うには近すぎる ―― それがわたしたち、キョーダイ。 　　禁断のキョーダイ的 “ 恋愛衝突 ( ラブコンフリクト ) ” ついにOVA化 ! ! 　　≪ストーリー≫ 　　バレンタインデーが間近に迫ったある日のこと。 　　帰宅した絵麻の手には、きれいにラッピングされた小箱があった。 　　それが 「誰かに贈られるチョコレート」 だと察し、浮き足立つ兄弟たち。 　　そんななか、弥が 「僕は逆チョコをあげる !」 と兄たちの前で宣言して ! ?

动画DVD/BD第7卷收录TV未放送第12.5話「切望」

动画DVD/BD第7卷收录TV未放送第12.5話「切望」

Elaine is a young woman who lives in a skyscraper in a megacity. Suffering from depression and anxiety, she hasn't gone out of her room for months. One day, the thundering sound of water falling outside her window wakes her up. Outside her window is a window cleaner with soap in his eye. He needs a tissue to wipe his eye, and Elaine is the only person who can help. But that would require her to open the window and reach out. With a full anxiety flare-up, Elaine retreats behind curtains to shut him out and keep herself "safe." She tries ignoring him, but he doesn't go away. Eventually, she decides to gather up little courage to open the window. She hands the window cleaner a tissue and relieves him from pain. But it's not the window cleaner's gratitude that surprises Elaine. She realizes she opened the window by herself. It's spring outside, and things are alive and moving. The breeze wakes her up from a long slumber. She smiles for the first time because she sees the window is clear like her mind. She can finally rip the old pages from her calendar and catch up on the life she had been missing.

Elaine is a young woman who lives in a skyscraper in a megacity. Suffering from depression and anxiety, she hasn't gone out of her room for months. One day, the thundering sound of water falling outside her window wakes her up. Outside her window is a window cleaner with soap in his eye. He needs a tissue to wipe his eye, and Elaine is the only person who can help. But that would require her to open the window and reach out. With a full anxiety flare-up, Elaine retreats behind curtains to shut him out and keep herself "safe." She tries ignoring him, but he doesn't go away. Eventually, she decides to gather up little courage to open the window. She hands the window cleaner a tissue and relieves him from pain. But it's not the window cleaner's gratitude that surprises Elaine. She realizes she opened the window by herself. It's spring outside, and things are alive and moving. The breeze wakes her up from a long slumber. She smiles for the first time because she sees the window is clear like her mind. She can finally rip the old pages from her calendar and catch up on the life she had been missing.