Happy Ending, Together

Alt title: Happy End wa Goisshoni

If you're looking for manga similar to Happy Ending, Together, you might like these titles.

Soshite Tsuzuki Ga Aru No Nara

Soshite Tsuzuki Ga Aru No Nara

When the unmotivated editor of a mahjong manga magazine, Sakaguchi, stops at a convenience store in the middle of a business meeting, he is reunited with his senior high school underclassman, Fujishiro. Fujishiro's ability forced Sakaguchi to abandon his dreams of becoming a mangaka, but Fujishiro has stopped writing and is living the life of a part-timer. In order to get Fujishiro to draw manga once more, Sakaguchi meddles in Fujishiro's business.With its novelty, Fujishiro's manga becomes popular, and when he's lured away by a major publishing company, Sakaguchi thinks that that is the end of their relationship 

I agree

Harukawa-kun to Yuki-sensei no Fudanshi Jijo.

Harukawa-kun to Yuki-sensei no Fudanshi Jijo.

Yuki-sensei is a popular BL manga author, but what the readers don't know is that Yuki-sensei is actually a guy named Fuyuki, a fudanshi. His assistant Harukawa has long liked Fuyuki's manga, but what are his feelings towards Fuyuki?

I agree

My Boyfriend, The Mad Dog

My Boyfriend, The Mad Dog

When Honma agreed to be the exclusive assistant to Akae, a popular manga artist, he didn’t realize just what "exclusive" meant! Soon Akae refuses to draw another panel until Honma belongs to him - in mind and body. But Honma is haunted by a painful past. Can Akae help heal old wounds? Meanwhile Akae's editor Misonou has his own problems when another assistant, Sakai, shows up with some feisty demands. Soon Sakai has literally run Misonou ragged, and with his health in tatters he has a choice to make: Is diving into his work a good prescription, or has the best medicine been right in front of him all along?

I agree

Mijika na Koi Dato Omou Kedo

Mijika na Koi Dato Omou Kedo

College student Yuuma Yoshiya gets very little attention from girls and entirely unwanted attention from guys. He gets groped on trains, hit on by his male friends, and back in school he once even had his gym clothes stolen. His love life is pretty much non-existent until he meets his next-door neighbor, Touru, a salaryman who feeds the same stray cat Yuuma has befriended. What else do these two cat lovers have in common? Has Yuuma finally met a man who will treat him right?

I agree

Otokogokoro

Otokogokoro

I agree

Koibitogokoro

Koibitogokoro

Salary man Saki almost makes it home but passes out from fever just as college student Shinomiya passes by. When Saki comes to he realizes he's in a strange apartment and Shinomiya has been taking care of him for the past two days! Not wanting to be indebted, Saki tries to repay him as thanks but Shinomiya's having nothing of it. Luckily, Saki's pretty creative when coming up with a way to express his gratitude that has them both wanting more.

I agree

Love Recipe

Love Recipe

Tomonori Ozawa has just landed a job at a large publishing firm. The only catch is, he is the new editor of a Boy's Love magazine! On top of that, he is stuck dealing with Sakurako Kakyoin, a male yaoi artist who is notorious for missing his deadlines. To become a full-fledged editor, Tomonori-kun has to start from the bottom — checking drafts, editing scripts and lettering. Now if only Kakyoin-sensei would stop sexually harassing him, he could actually get some work done!

I agree

Rakuen Gentei Renai Jijou

Rakuen Gentei Renai Jijou

Novelist Orihara has had a run of bad luck. He gets 2nd place for his novel, his part-time job's company went bankrupt, and his fiancee cancels their engagement for her boss who she was seeing at the same time. So to get away and relax, he uses the paid trip he had planned with his fiancee alone. Strangely, since the airport, an unknown man has been helping him here and there making him curious as to whether this guy is helpful or actually a stalker. While on the trip, Orihara runs into a man named Jeffrey who laters turns out to also be a novelist. Too bad Orihara doesn't find out that Jeffrey is an active BL novelist until he's being attacked. Luckily, the helping man from before comes to his rescue where Orihara finally recognizes the man as his former fiancee's younger brother Takeru. Takeru finally confesses that he's loved Orihara since his sister first introduced them. 

I agree

I Can't Even Breathe Without You

I Can't Even Breathe Without You

Lazy, deadbeat manga author, Niki (pen name: Kaoruko Goutokuji), finally caught his big break! Except for one problem: his almost supernatural inability to do just about anything! But with a hot, elite business man, Shoji Tatsuhiko, as his childhood friend who constantly looks out for him, who can blame him?

I agree

Ashita wa Joutenki

Ashita wa Joutenki

Poor student Ikumi Amanume through a series of strange happenings, finally found a great way to supplement his income by becoming the housekeeper for his next-door neighbor, Yuuji Touno, a notable scenario writer. Poor student Ikumi Amanume through a series of strange happenings, finally found a great way to supplement his income by becoming the housekeeper for his next-door neighbor, Yuuji Touno, a notable scenario writer. 

I agree