In the vlog, Erich asks Kathryn yes-or-no questions on sundry matters, some of them about relationship.
Here, Kathryn gives fans an idea on how she and Daniel make their relationship work.
One of Kathryn's main perpectives on relationship is that it takes hard work to keep it smooth sailing.
"Hindi lang iyan porket in love kayo, yun na yun. Maraming pagdadaanan," the 23-year-old actress underlines.
"Hard work siya kasi kailangan mo siya trabahuin... Kasi para for me, choice mo yun, e."
Kathryn then cites the story of Primo and George, the characters she and Daniel played in the 2018 romance film, The Hows of Us.
Their characters went through rough patches in their relationship until they realized the value of communication.
"Natutunan namin from Primo and George para maging in love kayo sa isa't-isa, it's a choice.
"Decision mo yun kung gusto mo. Kung gusto niyo pa ito ayusin.
"Kung nag-away kayo, gusto niyo ba ito pag-usapan? Nasa inyo yun.
"Kasi kung walang communication, wala yung eagerness na ayusin natin ito, wala.
"Dapat may conscious effort."
Kathryn says she and Daniel—or DJ as close friends call him—have learned to talk over their troubles.
The young actress says, "Dati may rule kami bawal matulog hangga't hindi nase-settle yung problem na ito.
"Bawal matulog na may sama ng loob yung isa. Pero siyempre, may mga away na...
"Siya kasi, 'Ayusin muna natin.' Ako yung parang, 'Wait lang, kailangan ko huminga.' Ayoko na for the sake na maayos.
"Kapag ganun, kailangan bigyan namin ng time yung isa't-isa and then pag-uusapan...
"Parati kami nag-uusap ni DJ, so feel ko yun yung nakatulong."
Erich also asks Kathryn if she is a "submissive girlfriend."
Kathryn answers "no."
She says, "What's good about yung relationship namin ni DJ, walang dominant, walang submissive, pareho.
"Dapat tayong girls, pinapa-feel mo na, alam mo yun, yung pagkalalaki nila.
"Pero nirerespect din niya yung decisions ko kapag ayaw ko, kapag gusto ko.
"May voice din ako."
When it comes to courtship, Kathryn says it is a must.
"Kailangan," she says, revealing that Daniel went through the process.
"Important iyan, hindi tayo ngayon yung manliligaw ka sa text. Hindi, hindi..."
Kathryn adds that the courtship should continue to be part of the relationship.
"Every day, dapat parang ka nililigawan.
"And, siyempre, do your part din as a girlfriend kung paano ka sa guy. Give and take."
Kathryn and Daniel have been in a relationship for seven years.
In May 2019, Kathryn posted a video and a love letter to Daniel to mark their seventh anniversary.
In letter, the actress also talks about how staying in love doesn't have a formula.
She writes, "Staying in love is a decision you make every day.
"You have to appreciate what you have every single day.
"You have to grow together—and sometimes that means growing individually, never growing apart.
"And no matter how hard life may be, you never give up on each other."