
Can someone tell me if this is a tragedy? Are they still alive and happy at the end? Those last few words in that chapter are suddenly talking in past tense...

The gist concerning the main couple is, Eunho gets his portrait painted by Jaeha. Jaeha exhibits it, Eunho proposes under it. He is already wearing his ring, and gives Jaeha this. Then the extra chapter shows a photo from their wedding, and the author on twitter has been showing photos of the wedding invite. It's not a tragedy.

(google translations so not the best for chap 72 "dear my lover")
- Eunho (to in bed Jaeha): "I'm going to go to school, get up and eat breakfast" "I will go to the art gallery afterwards" he kisses him and says "I love you"
- Eunho (sitting in his uni class and thinking to himself) :"After that day, naturally many people have been with my hyung." something like "When the lecture was over I went to Sun atelier" "It was a day to go to my hyung's house when the class was finished". "It was a natural day to spend with my hyung" "I still do not feel well"
- (Eunho has arrived to Jaeha's studio) Jaeha (to Eunho): "It's a bit late today"
- Eunho (to Jaeha): "I finished the lecture"
- Jaeha (to Eunho): "You must be tired"
- Eunho (to Jaeha looking over at somethinh): "Are you done, what about her sister?" (he then hugs Jaeha and says) "Why did you leave before?" (Jaeha returns the hug) "I missed you hyung, every day" "I want to be together all day" "right"
- Eunho ( who is now eventually sitting on his arse and posing for his portrait) "I became his model, my hyung wanted to show my portrait at the upcoming exhibition" "He will not know" "the figure of my hyung who draws me" "the eyes of my hyung" "every time you move the brush" something about how his Jaeha moves his mouth when he concentrates.
- Something about each portrait session taking a few hours
- Jaeha (to Eunho): Do you want to be here today?
- (Setting now Jaeha's house, Eunho is asleep on the bed, and Jaeha is getting in) Jaehe (to Eunho): "You" "Yesterday until the dawn, I even modeled on the Fulgang river so I'll have a bloom" (guessing this means he and Eunho have been working on the portrait till dawn, and went on to the river for a backdrop location and Eunho is exhausted) (he's touching Eunho's face) "Eunho is a pretty sincere student unlike me. When I was a child... his sleeping face is like a baby's...." something about spending too much time being busy and worried. "Eunho wants to be a member of society quickly" (image of Eunho in a suit) "Because you are going to become a more and more wonderful adult day by day" "I want to cling onto this moment" "I feel sorry for leaving" (kisses Eunho's forehead) "I knew this was happening. When I was a kid, I wanted to get married." (hugging Eunho) "And when you become an adult, Martha is going to get married and go away" "sleep"
- (mobile phone is ringing) Jaeha (talking to ex Han Joon): "Oh Han Joon, ah, long time no see. What's up?"
- Han Joon (to Jaeha): something about the exhibition
- Jaeha (to Han joon): something like thank you, I'll get rid of it"
- Han joon (to Jaeha): "I'm like a saint" "I just did it, I see it" (having a fag at the window) "Now it looks like it's really made up" (I think Jaeha is showing Han Joon the portrait he wants to exhibit and it shows a pleased Eunho).
- Not sure who is speaking, but basically they are saying that they have been talking about the portrait for a long time and now it's time to go to sleep. (Jaeha looks over at the sleeping Eunho.)
- Han Joon ( to Jaeha I think): "I lost"
- Jaeha (to Han joon): "Han joon, why are you being so nice to me?" "Before the divorce , I just used you"
- unsure who says this: "Well" "I once really liked you" "Let me say good bye to my love" "I'm sorry, and thank you'
- Jaeha (to Han joon) "I wish you were happy though, Han joon Ah.
At the exhibition, Eunho is walking up to Jaeha who is looking at the portrait he painted.
- Eunho (to Jaeha): "Is it okay?"
- Jaeha (turns around, to Eunho):" What?" (think it's J who says something like) "There may be people I know.... then your hyung may be in trouble" "Why are you worried, I'm fine"
- Eunho fumbled in his pocket for the ring he is going to propose with.... "hyung"
- Jaeha: "huh?" "I wanted to break up in Jeju island" "I can not refuse if I get a ring" (not sure who said the last bit)
- Eunho, already wearing his own ring puts Jaeha's ring on his finger "then... I can not turn back now"
"Now you can not turn back"
- Eunho (showing of his ring): "Indeed"
- Jaeha (looking at his hand with a ring, which he is remembering his old wedding ring) "long time no see" (they are putting their heads together) "I did not have it" (love) "I mean I think I've heard of it before" (hugging underneath Eunho's portrait) "This time really"
- Portrait it titled 'Beloved boy"
Fin
Jaeha is basically saying how he has found love with his beloved boy. Eunho gets his husband, all is well.

I read this chapter this morning, and have been agonizing about it all day.
Don't try to make a private deal, or get some kind of karmic revenge. Call the police, hand over the recordings, get Kyoko interviewed and drug tested and arrest these women!
It's not the second time they've done this, it's just that before they attacked her, they attacked someone who could afford minions, and 24/7 surveillance.
We have no idea how many other actresses these crazy people have killed/paralyzed/attacked.
Giving them a police record and a trial is literally your civic duty!!!

Umm you don't seem to have realized it but this takes place in JAPAN, y'know... another country, for one thing. For two taking things to the police often CAUSES the problems in the first place: see domestic violence perpetrators not being prevented from killing their victims by the restraining order they procured from the police thinking it would protect them (you mean a thin sheet of paper isn't enough to stop a really determined asshole with a gun!!!!???? Say it ain't so! /s You're really naive it seems). For three, they are ACTORS in Japan. Causing a huge uproar over a scandal that might turn out to be nothing, or easily explained away by the accused in court, is a scandal in and of itself and could be career destroying. With such a strong work ethic that Japan has no one would willingly destroy their careers over something like that. Read Inochi and you'll see why you should think before typing next time.

Read above. It has nothing to do with that. Kt.
...this would be the honey I would want to marry. He's so kind and patient and caring, and puts up with so much and he needs someone who deserves him!! That poor wee darling!!!!!