We already know that Rin-Ne lived with his loving grandparents until just recently... but where the heck are his parents?
Well, we get some answers in "Rin-Ne Volume 4," which is mostly taken up by the revelation of who Rin-Ne's father is, and just what a devious pain-in-the-derriere he is. Rumiko Takahashi packs in plenty of hilarious comedy, money gags and a few new characters who seem to be making trouble for Rin-Ne.
When he goes to the bank, Rokuman makes a horrifying discovery: Rinne is not only broke but overdrawn! And the culprit turns out to be his father, the president of the Damashigami Company, who wants Rinne to take over from him even as he sucks away every yen his son has earned. And when he steals Rinne's tatami mats, the enraged shinigami follows him into the afterlife to get them back.
Unfortunately, the entire scenario is a massive trap to drag Rinne into the Company... and marry him to one of his dad's damashigami girls! Even worse, Sakura has been dragged into the middle of it.
Then a bunch of cursed test pens cause Rinne to encounter another shinigami, a young girl named Ageha who has a passionate hatred for damashigami. She's looking for her sister, who went off to attack the damashigami... and Rinne finds out that his dad is involved yet again!
This entire manga volume revolves around the introduction of Rinne's father Sabato -- and since fathers in Rumiko Takashi works are idiots, slimy deadbeats or dead, you can bet that he's a piece of work, since we see flashbacks to him robbing his little son's piggybank. Think Genma Saotome from Ranma 1/2, but a lot hotter and with a full head of hair.
And another Takahashi staple is added to the stew: more romantic rivals and misunderstandings! While Tsubasa has added a little awkwardness to the story, it doesn't take long for Sakura to misunderstand Rinne's alliance with Ageha. Pair that with Tsubasa's love charm, and you have plenty of romantic problems in store.
Along the way, Takahashi packs in plenty of hilarious running gags -- shinigami money attacks, expensive beef, a contagious kitty cold and a mysterious seal that keeps helping Sakura. Despite the high stakes, she keeps the tone light and humorous, and adds in some fun twists and gags to the idea of the afterlife.
"Rinne Volume 4" is all about a devastatingly dreadful dad, and some revelations about Rinne's increasingly troubled family. And we haven't even found out about his MOM yet.