In Japanese, 'love story' is typically expressed as '鎭嬫剾銇┍ (ren'ai no hanashi)'. Different contexts might call for slight variations, but these are common ways to say it.
The word for'story' in Japanese is 銆岀墿瑾炪(monogatari) or 銆屻偣銉堛兗銉兗銆(sutoorii).
Ai shiteru was a common expression in Japanese for "I love you."
In Japanese, 'love story' is commonly expressed as '銉┿儢銈广儓銉笺儶銉 (rabu sut艒r墨)'. But a more traditional and native way to say it is '鎭嬨伄鐗╄獮 (koi no monogatari)'.
The common way to say 'I love you' in Japanese manga is '鎰涖仐銇︺倠' (aishiteru).
The phrase 'write a story' in Japanese is '鐗╄獮銈掓浉銇 (monogatari o kaku)'.
You can say '鐭亜鐗╄獮 (銇裤仒銇嬨亜銈傘伄銇屻仧銈)' to mean 'short story' in Japanese. But '鐭法灏忚 (銇熴倱銇恒倱銇椼倗銇嗐仜銇)' is more frequently used.
In Japanese,'manga' is pronounced as 銇俱倱銇 (manga). It's a direct borrowing from the English word and is widely used in Japanese language and culture.
The common way to say 'tell me a story' in Japanese is 銆岀銇亰瑭便倰銇椼仸銇忋仩銇曘亜銆 (Watashi ni o-hanashi o shite kudasai). This is a polite and commonly used phrase.
In Japanese comics, 'shit' can be expressed as '銇忋仢 (kuso)' or '绯 (fun)' but these words are quite vulgar and not commonly used in polite or formal settings.
The word for 'comic book' in Japanese is '銈炽儫銉冦偗銉栥儍銈' (komikku bukku).