Jibun Katte.
Whenever Tomo gets a girlfriend, his selfish childhood friend Hideaki comes between them. Now that Tomo has a new girlfriend, he's on the lookout, but nothing happens. Thinking the lack of intervention strange, Tomo then discovers that Hideaki has a new lover -- a man! Maybe he was just showing off, but Tomo can't forget how gentle his friend looked when he was worrying about love.
Window to Window
https://www.lezhin.com/en/comic/window_en Childhood friends Ginu and Yubin live in separate apartments in separate buildings right next to each other – so close, in fact, they can talk to each other and see into each other’s apartments through their windows. But Yubin’s long-held secret is revealed one day when Ginu sees him doing something naughty through the window...
Saiyaku Wa Boku O Suki Sugiru
Two families are tied together by a curse. Every 100 years, one person from each family must share the same fate for exactly one year. The pair will be subjected to 12 misfortunes where one will get hurt while the other must sustain their injuries in return. When Kagura Izumi was 7, his parents died in an accident. Since then, he has been living an ordinary life. Until the day of his 17th birthday where he meets a mysterious transfer student, Ichijyou Chihaya. However, this fateful encounter between them is only the start of their intertwined fate. For the next year, the two of them will be forced to face 12 misfortunes on the 13th of every month, a curse that has never left any previous pair alive.
Mainichi Seiten
One night, an unexpected guest turns up at science fiction magazine editor, Obinata Taiga and his family's home! The person was actually Asuoo Shuu, Obinata's former classmate, who has married their elder sister, and since became their brother-in-law. But, just when everyone is expressing their objection to Asuoo, they receive news that their sister has gone missing! Related series: Vol 1-2 Mainichi Seiten Vol 3-4 Kodomo wa Tomaranai Vol 5 Children's Time Vol 6-7 Kodomo no Iibun ----Aki-chan no Iibun Vol 8 Isoganaide Vol 9-10 Hanaya no Nikai de
Mad Cinderella
Teijin Sakuichi was born in a house of one of Japan's leading conglomerates while Ryota Kishi was born and raised in a common household and lived a rather crude lifestyle. Despite this difference, they were neighbors and childhood friends that grew up together. However in the winter of their third year in middle school, Sakuichi proposed to Ryouta before going to study abroad. Years later, having no contact, Sakuichi suddenly appears before Ryota completely changed.
Ki ga Au to Iu Koto wa
http://mangapark.me/manga/ki-ga-au-to-iu-koto-wa 1) Hitting It Off With You Shiraishi has been seduced by his so called "Best Friend" for 6 years since they were both in high school. The train they take to work, their favorite music, their sandwich choice for lunch... always happen to be identical. That strange relationship would never ever change, supposedly. But now that Shiraishi is divorced, it could be just a matter of time before he gets himself scored. 2) 1 + 1 + 1 Between a man who bears a past and a revived lover, the existence of a certain "man" becomes the trigger. Both prickly pain and sweetness are all in one long story... Related to: Kiga au to iu Koto de http://www.mangago.me/read-manga/kiga_au_to_iu_koto_de/
Sore Wa Isshun No Hikari, Dewanaku
Quiet, sweet story of an emotionally shuttered university sempai and his conversationally clumsy junior. Sharing the same last name and a love for classical music brings them together a little. But will this be enough to bridge the gap between the sempai's secret sorrow and the junior's awkward naivete?
Blue Lust